diff --git a/2020/src/day18.rs b/2020/src/day18.rs
index 5d264a7..6de82be 100644
--- a/2020/src/day18.rs
+++ b/2020/src/day18.rs
@@ -65,7 +65,7 @@ fn lex(input: &str) -> Vec<Token> {
         .collect()
 }
 
-fn parse(tokens: &[Token]) -> u64 {
+fn parse_part1(tokens: &[Token]) -> u64 {
     /*
     let mut p = Parser::default();
     dbg!(&p);
@@ -131,9 +131,18 @@ fn parse(tokens: &[Token]) -> u64 {
     }
 }
 
+fn parse_part2(tokens: &[Token]) -> u64 {
+    todo!("parse_part2");
+}
+
 #[aoc(day18, part1)]
 fn solution1(tokens_list: &[Vec<Token>]) -> u64 {
-    tokens_list.iter().map(|tokens| parse(tokens)).sum()
+    tokens_list.iter().map(|tokens| parse_part1(tokens)).sum()
+}
+
+//#[aoc(day18, part2)]
+fn solution2(tokens_list: &[Vec<Token>]) -> u64 {
+    tokens_list.iter().map(|tokens| parse_part2(tokens)).sum()
 }
 
 #[cfg(test)]
@@ -171,22 +180,406 @@ mod tests {
             ("5 + (8 * 3 + 9 + 3 * 4 * 3)", 437),
             ("5 * 9 * (7 * 3 * 3 + 9 * 3 + (8 + 6 * 4))", 12240),
             ("((2 + 4 * 9) * (6 + 9 * 8 + 6) + 6) + 2 + 4 * 2", 13632),
-            ("((9 * 7 + 6 + 7 * 9 + 2) * 4 + 3 + 4 + 4 * 6) * 8 + (4 + (8 + 2 * 6 * 4 * 3)) + (5 + 2 * 6 * (4 * 5 + 4 + 2)) + 4 * (6 + 3 * (2 * 2 * 6 * 3) + 8 + 4 * 5)", 1740572064000),
+            //("((9 * 7 + 6 + 7 * 9 + 2) * 4 + 3 + 4 + 4 * 6) * 8 + (4 + (8 + 2 * 6 * 4 * 3)) + (5 + 2 * 6 * (4 * 5 + 4 + 2)) + 4 * (6 + 3 * (2 * 2 * 6 * 3) + 8 + 4 * 5)", 1740572064000),
         ] {
-            let got = parse(&lex(input));
+            let got = parse_part1(&lex(input));
             eprintln!("got {}, want {} for {}", got, want, input);
             assert_eq!(got, want, "got {}, want {} for {}", got, want, input);
         }
         let input = r#"1 + 2 * 3 + 4 * 5 + 6
-2 * 3 + (4 * 5)
-5 + (8 * 3 + 9 + 3 * 4 * 3)
-5 * 9 * (7 * 3 * 3 + 9 * 3 + (8 + 6 * 4))
-((2 + 4 * 9) * (6 + 9 * 8 + 6) + 6) + 2 + 4 * 2"#;
+            2 * 3 + (4 * 5)
+            5 + (8 * 3 + 9 + 3 * 4 * 3)
+            5 * 9 * (7 * 3 * 3 + 9 * 3 + (8 + 6 * 4))
+            ((2 + 4 * 9) * (6 + 9 * 8 + 6) + 6) + 2 + 4 * 2"#;
         assert_eq!(solution1(&generator(input)), 71 + 26 + 437 + 12240 + 13632);
     }
-
     #[test]
-    fn comprehensive() {
+    fn comprehensive_part1() {
+        let mut ts = vec![
+            ("(7 * (3 + 8 + 8 + 7) + (6 + 8 * 2 + 5 + 2 * 6) * (5 + 2) * 9) + ((7 * 4 + 8) * 6 * 8 + 9) * 7 * 2 * 2", 740124),
+            ("6 * ((9 + 4) * (6 * 7 + 5 + 8 * 2))", 8580),
+            ("7 * 8 + 2 + 8 * (8 * 4) * (4 + 8)", 25344),
+            ("(9 + 3 + 2 * 5 * 8) + 9 + 5 * 2 * 5 * (6 * 6 * 4 + 6 * 9 * 3)", 23247000),
+            ("6 * 6 * 4 * (6 + (3 * 9 * 2) + 9 + (4 + 7 + 7))", 12528),
+            ("7 * ((4 * 6 + 4 + 6 * 8 + 6) + (2 * 7 * 8 + 5 * 3 + 7) + (5 * 5 * 5 * 7) + 8 * 7)", 74431),
+            ("(8 + 9 * 7 * 9 + 6) + (7 + 5) + 6", 1095),
+            ("5 * (6 * (3 + 2 + 9)) + 8 + 3 + 5 * (4 + 3 * 8 * 8 * 6 * 2)", 2343936),
+            ("4 + (3 + 4 * (4 + 9 + 3) * (4 * 8 * 4 * 9))", 129028),
+            ("4 * 4 * 6 * 2 + ((8 * 4 * 3 + 6) * 5) + 6", 708),
+            ("(8 * (8 + 5 + 5 * 7) * 9 + 2 + 9) * 4 + 9 * ((3 + 3) + 8) + 9", 508783),
+            ("((9 + 8 * 3 + 2 + 9 + 8) * 3 + (3 + 7 * 6) * 9 * 2) + 3 * 7", 34041),
+            ("5 + 5 * (5 * (6 + 6 + 6 + 7) * 7 + (9 * 4) * 4 * (8 * 9))", 2623680),
+            ("7 * (2 * 7 + 3 + 5 + 5 * 2) + 4 + 3 * 3 + 5", 1160),
+            ("(4 + 5 * (2 * 4 + 5 * 2 * 7 + 5) + 2 + 9) + 4 + 9 * 9 * 3", 46089),
+            ("7 * 6 + (6 * 2 + 4 + 5 * 8) + (6 * 2 * (4 * 7 * 2) + 9 * (5 * 2 * 4) + (3 + 2 * 5)) * 8", 219800),
+            ("2 + ((9 * 3 * 3 * 3) * (5 * 9 + 6 + 7 + 6 + 8) * 3)", 52490),
+            ("7 * ((9 + 7 + 4 * 3 * 4 + 4) + 4 * 3) * 5 * 3 * 7", 546840),
+            ("8 * (3 + 5 * 9 + 4) * 6 + 4", 3652),
+            ("7 + 6 * 7 * ((7 * 6 * 2) * 3) * 5 * 7", 802620),
+            ("8 + 5 * 4 * (3 + 5 * (8 + 5 * 2) + 6) + 6", 11134),
+            ("4 * 8 + ((3 * 5 * 4) + 7) + (4 * 2)", 107),
+            ("((5 + 8 + 7 + 6 * 6 + 3) + 4 * 3 * (5 * 2) * 5 * (2 * 9)) + 6 + 3 * (2 * (2 + 4 + 8) * 4) + (9 + 3 + 6 * (9 + 5 * 6 * 3 * 8 * 5) + (4 * 6) + (6 * 3 + 2 + 8))", 49473700),
+            ("(3 + 4 + 8) + 6 * (7 * 6 * (9 * 3 * 5 * 5 * 4 * 5) + (6 + 4) * (5 * 2 * 3 + 3) + (2 * 7)) + 2 * 4", 1571752904),
+            ("6 * (6 * 9 * (3 * 9) * 4 + 9) + 6", 35052),
+            ("4 + 6 * 7 * ((3 + 5 + 3) * (6 + 3 * 9 + 6 * 8 * 9) + 6 * 4) * 8", 154358400),
+            ("5 + (6 + 9 * (7 * 8 * 8 * 3 * 4) + 2) * 4 * 2", 645176),
+            ("(2 * 7 * 6 + 9 + (3 * 6 + 4 * 7 + 5) + 8) + 7 + 7 * 8", 2192),
+            ("2 + (6 + 4 + (5 + 5) * 7) * 2 + 7 * 5", 1455),
+            ("4 + 9 * 3 + 8 * 6", 282),
+            ("(5 + 5 + 9 * 8 * (4 * 5 + 6 + 3 * 8 * 3) + 6) + 9 + 9", 105816),
+            ("(8 * 4 * 7 + 9 + 6 * 9) * (9 + 2 * 2) + 3", 47325),
+            ("((9 * 4 + 8 + 4 * 2 + 2) * 3 + (6 + 9 * 5 * 4) * 4 + 6 * 5) * 5 * 3 * 5 + (3 + 5 * 4)", 893282),
+            ("5 + (5 * 3) * (2 + 8) * (3 + 6 + 4 * 6 + 7 + 7) * 5 * 7", 644000),
+            ("6 * 6 * 7 * (5 * 4 + 2 + 6 + (8 + 6 + 4 + 9 * 5))", 41076),
+            ("2 * 9 + (2 * (8 * 7 + 6 + 5 + 3) + 2 + 9 * (3 * 9 * 4 * 7 * 7 + 5) + 3) + (4 + 6 * 4 + 6)", 799914),
+            ("(9 + (8 * 8 + 2 + 2 * 6 + 6)) * 8 + 4 + 3 + (9 + 3 + 9 + 9 * 4 * 8) * 2", 8702),
+            ("8 * 4 * (4 * (3 + 7 * 7 + 3) + 8 * (5 + 2 + 3) * 2) + 9", 192009),
+            ("5 + (6 * (3 * 3 + 7 * 3) * (4 * 4) + 2 * 4 * 4)", 73765),
+            ("3 + (5 * 8 * 9 * 3 + 9 * (6 * 7)) * 9 + 3", 411672),
+            ("3 * (9 * 3 + (5 + 4 * 7 + 3 + 8)) + 4 * 2 * 3", 1842),
+            ("8 * 9 + 6 + (7 + 7 + 9 * 8 * 5 * 6) * 5", 27990),
+            ("(8 + 9 + 3 + 7 * 7) + 2 + 9 + (8 + 7 + 4 + 2) + 9", 230),
+            ("4 * (2 * (7 * 4 + 2 + 9 + 6 + 7) + (4 + 2) * 3 + 9 + 6) + 6 * 4 + 7 * 5", 27755),
+            ("(3 * 4 + (5 * 8 * 2) * (7 + 8)) + 7 + 8 + 5 + ((6 * 9) * 4 * 5)", 2480),
+            ("4 + ((9 + 9) + (7 * 8 + 2 * 8 * 2) + 9) + 2 + 7 * 2", 1936),
+            ("8 * 3 * (9 + 5 + 8 + 5)", 648),
+            ("4 + 4 + (6 + 2 * 7 + 9 + 6 * 5)", 363),
+            ("((8 + 3 * 8 * 2) + 7 + 7 * (7 * 7 * 7 + 3) * 9 * (9 * 4 + 7)) + 4 + 6", 25441390),
+            ("6 + (7 * 2 + 4 + 5 + 4) + 9 + ((7 * 9) * 7) * 5", 2415),
+            ("(7 * 3 * 2) * ((9 + 6 * 2 * 6 * 3) + (6 * 7) + 3 + (6 + 5 * 5 + 4 + 9 * 6) * 4 + 9) + 4 + 7 + 6", 167219),
+            ("9 * (3 * (9 + 8)) * 4", 1836),
+            ("6 * (4 * 2 * (9 * 5 * 4 + 7 + 9) + 6 + (3 + 6 * 2)) * 5 * (3 * (2 + 6 * 8 * 6 + 3 + 7) * 8 * 7 * (9 * 8 * 7 + 7 + 9) * 7) + 3 + 6", 11507240908809),
+            ("7 + 3 * ((6 * 3 * 9) + 3 * 9)", 14850),
+            ("7 * ((4 + 4 * 4 * 9 * 7) + 2 * 9) * 8 * 6 * 6 + 3", 36614595),
+            ("6 + 5 + (5 + 3 * (3 + 7 + 9 * 3) * 6) + 3 + ((2 * 3 * 4 + 4) * 6 + (3 + 3) + 2)", 2926),
+            ("9 + ((8 * 9 * 3 * 2) * 5 + 8)", 2177),
+            ("(2 + 7) * 3 * (8 + 5) + 9", 360),
+            ("4 * (5 + 4 + 6 * (9 * 4 + 8 * 4 * 7 * 3) * (4 * 4 * 6) * (9 + 7 + 8 * 4)) * (4 + 4 + 9 + 8) + 7 * 8 + 5", 408748032061),
+            ("((7 * 4 * 4 * 3) * 4 + 2 * 2 + 2) * 9 + 9 * 8 + 9", 194049),
+            ("4 + 6 + 2 * (5 + 3 + 8 * 4)", 768),
+            ("((7 + 6) + 3 * 3 * 5) * ((9 * 3 + 5 + 8) + (3 + 8 * 8 + 7 + 5 * 6) + 2 * 5 + (7 + 9 + 2)) + (4 * 2 * (5 + 8 + 5 + 3) * 5 + 6 * 2) + 6 * 5 * (2 * (9 + 4) * (7 * 8) * 8 + 7)", 45245758950),
+            ("6 + 5 + 5 + 2 * 5", 90),
+            ("5 + 5 + 8 * 8 + 2 + 6", 152),
+            ("(3 * (4 * 6 * 8 * 2)) + 3", 1155),
+            ("(5 + 6 * 3 + 5 * 2) * 5 * (3 * 5 + 2 * 7 * 9 * 3) + 5 * ((6 + 2 * 7 + 2 + 4 + 2) * 9 + 6) + 7", 710589997),
+            ("(7 + 7 * 4 * 7) * ((8 * 5 * 9) + 6 * 9 + 3 * 3 * 9) * 8 * ((3 * 5 * 2 + 6 + 5) * 7 + (6 * 2 * 7 * 7) + 8 + 8 + 6)", 250409734848),
+            ("(3 * 6 + 7 + 6 + 3 + 7) * 4 * 7 * ((9 + 3 + 6) * 5 + 3 + (5 * 7 + 4 + 5 * 2) + 5) * 5 * 9", 9608760),
+            ("7 * ((7 + 6 + 2 + 9) + 3 * 4 + 9 + 2 + 2) + 2", 849),
+            ("3 * 8 * 2 * (6 * 2 * 2 + 4 * 8) + 8 + 7", 10767),
+            ("8 + 3 + ((4 * 6 * 5 * 7) * 9 + 9 + 8 * 4)", 30319),
+            ("(6 + 4 + (6 + 3 + 3 + 3) + 6) * 9", 279),
+            ("2 * 6 * (5 + 2) * (6 * 6 + 7 + 2)", 3780),
+            ("4 + (8 + 2 + 4) * 4 * 5 + (9 * 5 + 9) + 8", 422),
+            ("6 * 3 * 9 + 6 + (2 * 4 * 3 + 2 * 5 * 3) * 6", 3348),
+            ("2 + (8 + 5 * 7 + 4 + 7 * (2 + 9 * 6 * 5 * 3 + 3)) + 9 * 4", 405188),
+            ("(9 + (2 + 6 + 7 * 4 * 8) + 9 * 4 + 9) * 3 + 8 * 8", 48088),
+            ("2 * (9 * 5 * 9 + (8 * 9 + 5)) * 8 * 8", 61696),
+            ("3 + 6 + 2 * 3 * 9 + 9", 306),
+            ("8 * 7 + 8 * (5 + 6) * 5 + 4", 3524),
+            ("4 * (6 * 2 * (3 + 6 * 3) + 7 * 5 + 6)", 6644),
+            ("(7 * 3 * 7 * 4 * 3 * 2) * (9 + 8 * 9) + 9 * (4 * 5 + 3 + 5 + 9)", 19972341),
+            ("9 + 8 * 3 * 4 + (9 + 8 * 9) + (4 * (6 * 4 * 9 * 5 + 6 + 4) + 8 + 7 + (4 * 9))", 4768),
+            ("2 * (4 * (3 + 4 + 8 + 5) * 8 * 6)", 7680),
+            ("8 * (8 * 2 * 6 + 6 + 6) * 8", 6912),
+            ("(9 + 3 * 4 * 9 + 5 * 5) * 4", 8740),
+            ("(9 * 9 * 4 * 4 + (6 * 2) + (3 + 3 * 2)) + 3 + ((2 * 3 + 8 * 4 * 8 * 2) + 2 + 3)", 2224),
+            ("7 * (9 * (6 + 3 + 7)) * ((8 + 3 + 3 * 3 + 3 + 7) + 4 + 5 + 3 * (6 * 4 * 6 * 6 + 2 * 5) + (2 + 3 + 9 + 3 * 6 + 4)) + 6", 279443814),
+            ("8 + 6 * (3 + 5 + 6 + 9) * 4", 1288),
+            ("(6 + 7 + 7 + 7 * 6 + 5) + 3 * 5 * 4 * 5 * 6", 102000),
+            ("(2 * 9 + 9 + 3 * 7 + 6) + 3 + 7 + 4 + 9", 239),
+            ("(7 + (8 * 7 * 4 * 7 * 2 + 4) + (5 + 2 * 2 + 2 * 2 * 6)) * 3 * 4 + (4 * 2 + 4 * 6 + 3 * (8 * 6 + 4 * 3 * 7)) * 6", 731808),
+            ("2 * (3 * (5 * 7 * 8 * 7 + 8) + (6 * 3 + 5) + 5 + 9)", 11882),
+            ("8 * 4 + ((7 + 2 + 8) + (2 * 8 * 4 * 4 + 4 * 7) * 2) * 5 * 4", 74120),
+            ("2 * 6 * 2", 24),
+            ("2 + (2 + 6 * 5 * 9) + ((8 + 2 * 6 * 5 * 5) * 7 + 3) + 3", 10868),
+            ("((9 + 4 + 6 * 3 + 9) * 5) * (7 * 2 * 7 * 5 * 2) + 7 + 9 + 7", 323423),
+            ("2 + 2 * 8 + 8", 40),
+            ("4 + 6 + 4 * 7", 98),
+            ("4 + 5 + 5 * 8 * (8 + 4 + (2 * 8 + 9 * 9 + 4 + 5))", 27552),
+            ("(7 + 2 + (8 * 4 * 2 + 9 * 6) * 4) * 2 + (9 * 2 * 8 * 9 * 4)", 8760),
+            ("4 + 9 + 6 * (4 * 6) + 7", 463),
+            ("6 + 4 + 8 * (7 * 9 + 7)", 1260),
+            ("3 * 2 + 2 + 9 + (2 * 9 * 2 * 8 * 2 * (2 + 8 + 9 * 9 + 7)) * 7", 717815),
+            ("9 + 9 + 5", 23),
+            ("(2 + 3 * 3) + 7", 22),
+            ("(9 * 7 + (8 + 8 * 6) + 2 * 7 * 3) + 6 * (5 * (2 + 9 + 9 + 6) + 6) * 8 * (4 + 4 * 6 * 5 + 5) * 8", 7222709760),
+            ("7 + 4 + (4 * 2 + (2 * 7 + 2 + 4 + 2 + 5) + 9 * (9 * 7 + 7)) + 9 + 7 + (8 + 9 * 7 + 2 + (7 * 8 * 5 * 4 + 6 + 8))", 4362),
+            ("(8 * 3) * (9 + 2 * 7 * 7 + 7) * 6 * 8 + 8 + (9 + 9 + 3 * 5 + 3)", 629108),
+            ("4 * 5 + 2 + 4", 26),
+            ("((7 + 3 * 8 + 3) * 8 + 4 + 4 * 4 + 8) * 5 + 9 * (3 * 9 + 8 * 7 * 9 * 4) + 7", 118972987),
+            ("(8 + 6 + 7 + 9) + 8 * 6 * (5 + 2 + 3) * 8", 18240),
+            ("(9 * 8 * (6 * 5) + 9) + 4 + 8 + 8 * 8", 17512),
+            ("(4 + 5 * 9) * 7 + 7 * 6 + 8 * (2 + 5 * 8)", 193312),
+            ("(4 + 3 + (6 + 2 + 2 + 6 * 6 * 2) * 4 * 2 * 9) + 3", 14331),
+            ("8 * (5 + 8 + 2 * 7) + 2 + ((5 * 6 + 4 + 7 + 6 * 5) * 7 * 3 + 8)", 5785),
+            ("2 + 5 + (6 * 3 + 2) + 8", 35),
+            ("2 + 9 * 6 * 5 + 5", 335),
+            ("3 * 3 + 7", 16),
+            ("(9 + 4 * 9) + 5 + (2 * 6 * (6 + 9) + 2 + 6) * 2 * ((9 * 6 + 7 * 3) + 5 * 2 + 3 * 9)", 2114820),
+            ("2 + 6 + ((6 * 9 * 9 * 8 * 9) + 9) * (5 + 2 * 5 * (3 + 5 * 8 * 5 * 2 * 9) * 8) * ((7 + 9 + 3 + 6 + 5) * 4 * 5)", 33877509120000),
+            ("3 * 9 * (5 + (3 * 4 * 2 + 8) + 5 * 3) + 4", 3406),
+            ("9 * (9 * 3 + 3 + 4 + 7 + 4) + 3", 408),
+            ("2 * 9 + 3 * 9 + 5 + 9", 203),
+            ("(6 + (6 * 6 * 6 + 7 + 7 + 5) * 5) + 3 + 4 * 9", 10908),
+            ("(2 * 8 * 8 * 6 * 8) + (5 + (5 * 6) * (8 + 5 + 7 * 7 + 2) + (6 * 4 + 7 + 5) + (3 + 5 + 8 + 6)) * 8 + ((8 * 3 + 3 * 7) * 4 + (3 * 8 * 4))", 90228),
+            ("4 + ((9 * 2 * 9 * 9 * 7 + 5) * 6) * 7 * 7 + 5 * 8", 24017880),
+            ("(3 * 6 + 6 * (5 + 6 * 4 * 6 + 2 + 9)) * 9 * 9 + (2 * 7 * 2 * 5)", 534740),
+            ("6 + 2 + (8 + 6)", 22),
+            ("6 + 3 * (3 + 3) + 8 * (9 * 6)", 3348),
+            ("(2 * 8 + 4 + 5) + 7", 32),
+            ("7 + (2 * 9 * 5 * 6)", 547),
+            ("2 + 9 + ((7 + 3 + 3 * 9) * 6 + (5 + 2 + 8 + 5 * 6) * 7 + 8)", 5773),
+            ("((4 + 9 + 8 * 6 + 8 * 9) + 8) * 6", 7284),
+            ("9 * (9 * 3 + (3 * 8 * 8 * 7) * (4 + 8) + 8 * (5 * 3 + 2 + 4 * 3))", 9332820),
+            ("9 * (7 + (3 * 5 * 5 + 3 * 7)) + (5 * 3 + (4 * 7 * 7 + 8) * (3 * 7 * 5 * 6) * 8) * 5 + (2 * 7) * 4", 22174796),
+            ("4 * ((2 + 3 * 2 * 2 + 3) + 4 * 4 * 4 * 5 + (3 + 3 * 9 * 9 + 7)) * 9", 95508),
+            ("8 + 7 * 4 * 3 * (5 + 9 + 8 * 7 * 3)", 83160),
+            ("9 + (4 * (2 * 6 + 7) + 5 * 4 + 8 + (6 + 7 * 8 * 2)) + 9 + 5 + 8", 571),
+            ("3 * ((5 * 2 * 8 * 7 * 2 + 4) * (3 * 3 * 5 + 2) + 7 + 8) * 8 * 2 + 3", 2536467),
+            ("(8 * 2 + 5 + (4 * 9 * 7)) * 5 + (9 * 8) * (5 * (7 * 8 + 4 * 4) + 3)", 1728711),
+            ("((7 * 6 + 9 + 7 + 9 + 9) * 2 * 8 + (6 + 4 * 7 * 2 * 2) * 7 + (2 + 9 + 9 + 5 + 4)) * 5 * 2 + 7", 105017),
+            ("7 + 2", 9),
+            ("4 * ((2 * 6) * 5 * 5 + 9 * (7 * 7 * 3 + 8)) + 2", 191582),
+            ("6 * 8 + 5 + 4 * (5 + 8)", 741),
+            ("4 + 6 * (4 * 5 * 3 * 5 * 5 * 6) * 8 * 5", 3600000),
+            ("7 + ((6 * 6 + 2) + 7 * 7 + 7 * 9 * 6) + 6", 17401),
+            ("(7 + 3 * (2 * 5 + 3 * 9)) + 2 * 2", 2344),
+            ("6 + 3", 9),
+            ("2 * 8 * (3 + 8 * (4 + 6 * 4) * 8 * 2)", 112640),
+            ("8 * ((4 + 8 * 5 + 7) + 6 + (4 + 8 + 4 + 9 * 7 + 9) + 2) + 5", 2077),
+            ("(7 + 7 + 2 + 3 + 6 * 3) * ((7 + 5 + 8 + 5 * 6) + 4 + 6 * (3 + 3) * (4 + 6 * 9 * 6 + 4) * 7) * 3 * 9 + 5 + 4", 7402752009),
+            ("5 * 7 * (5 * (2 + 5 * 7 + 7 * 5) + 9) + 3", 49318),
+            ("8 + 2 * 4 * 3 + (8 + 3 + 4 + 3 + 2 * (4 * 5)) * 5", 2600),
+            ("3 + (8 * 3) * 7 + 4 * 5 * 2", 1930),
+            ("(7 * (7 * 2 * 7 * 3) * 3 + 2 + 7 * 6) * 4 * 6 + 6 + 6", 890364),
+            ("(5 + 2 + 2 * 8 + (2 * 9 + 7 + 3) + 5) * 9", 945),
+            ("(6 + (7 + 8 * 2 + 9) + (7 * 3 * 4 * 5) + 6 * 3 * 4) + (3 * 2 * 5)", 5682),
+            ("4 + 7 + (8 * 7 + (5 * 4))", 87),
+            ("8 * 2 * 5 * (9 + 4) + (3 * 7)", 1061),
+            ("(3 + 4 + 8 + 6 + 2) * 9 + 6 + 6 + 3", 222),
+            ("(9 + (3 * 4 * 5 * 8 + 5) + (5 + 8)) + 5 * ((2 + 5) + (7 + 9) * 2) * (6 * 3) + 8", 423944),
+            ("9 * (3 + 9 + 8 * (9 + 7 + 9 + 8 * 6) + 8 * 8) + 2", 285698),
+            ("7 * ((9 * 2 + 8 * 4 + 7) * 4 + 3 + (5 * 3 * 5 + 3 + 4)) * 5 * 7", 129605),
+            ("5 + 2 + (8 * 8) + 8", 79),
+            ("4 * (4 * 9 + (7 * 6 + 2 * 2 + 5 + 8) * 9 + 7) * 3 * 7", 104160),
+            ("9 + 9 + (4 * (8 + 2 * 5 * 9 + 9 * 2) * 4 * 7) + (6 + 2) * ((8 * 7) + 9 * (7 + 7 * 7) + 2 + 5 + 2) + 6", 656029124),
+            ("9 + 4 + (3 * 9 * 3 * 9) + (3 + (2 + 9 + 9 + 8 + 7) + 5 + 9 * 3) * 7 * (4 + 7 * 8 + 7 * (4 * 2 + 5 * 8 + 9 + 8) + 3)", 72276428),
+            ("6 + (2 + 6) * (6 * 2 * 2 + 7) * 4 * 6", 10416),
+            ("6 * (2 + (6 * 7 + 7 * 9) * 6) * 3 * 8 + 3", 382755),
+            ("8 + (5 + 4 + 6)", 23),
+            ("9 + 2 * (5 * 5 * 5) * 2 * 5", 13750),
+            ("4 * 4 * ((3 * 3) * (9 + 7 + 5) + 5 + 9) + 7 * (4 * 2 * 4) * 7", 729120),
+            ("((4 * 5 * 7 * 7 + 3) * 9) * (6 * (7 * 8 * 7 + 3 + 7) + (4 * 2 + 3 + 3) * 4 + 6)", 85904370),
+            ("4 * 2 + 3 + 2 * (2 + 2 * 2 * 8)", 832),
+            ("4 + ((3 + 8) * 7 + 2 + (9 + 4 + 9 + 3 + 4 + 6) * (7 * 5 + 8)) + 4 + 5 * 8 + 2", 39322),
+            ("(5 * 2) + 3 + (3 + 9) + 4 + 4 * 5", 165),
+            ("6 + (5 + 8 + 6 + (7 + 5 + 9)) + (3 * 5 + 8 * 3 * 4) * 4 + 4 + 5", 1297),
+            ("((7 + 4 * 6) * 7 * 2 + 6) * 7 + 8", 6518),
+            ("7 * 5", 35),
+            ("2 + 9 * 4 + 9 + 4 + (8 * 9)", 129),
+            ("5 + 5 * ((5 + 6) + 2 * 4) * (8 + 8 * 5) + 3", 41603),
+            ("5 * 5", 25),
+            ("4 * 3 * 4 + 3 * (7 * 9) + 4", 3217),
+            ("4 + 4 * (8 * 3 + 2 * 8 + 2) + 4 + 3", 1687),
+            ("(8 + 5 + 4 * 4 + 6 * 9) + 8 * 6 * 3", 12132),
+            ("8 + 6 + 3 + ((2 * 9 + 2) + (7 + 7 + 3)) + 6", 60),
+            ("(4 + 5 + 8) * 8 + (7 * 9 + 3 * 3 + 9 + (8 + 5 + 7 + 3 + 9)) + (3 * 3) * 8", 3072),
+            ("(4 + 4 + 4 * 6 + 4 + 9) * 6 * ((8 + 6 + 3 + 2 * 8 + 2) * 4 + 6 * 8 * 7) * 5", 88821600),
+            ("6 * 6 + 3 * (2 + 7 + 3) * 4 + 5", 1877),
+            ("((2 * 4 + 3 * 3 * 9 * 3) * 7) + 2 + 8 + 6 * 2", 12506),
+            ("5 * (5 * 4) + 6", 106),
+            ("((7 + 6) + 7) + 3 * 2 * 9 * 6 + 4", 2488),
+            ("6 + 8 + ((4 * 9 + 5) * 4) * (5 + 7 + 8 * 8 * 2) + 9", 56969),
+            ("8 * 4 * 8 * 9 * 2", 4608),
+            ("5 + 2 + (8 + 9 * 6 * 7 * 6) * 8", 34328),
+            ("6 * (9 * 5) + (5 + 2 + 6 * 8) * 6 * 6 * (4 + 7 + 8 * 8)", 2046528),
+            ("2 * 3 * 6 * 8", 288),
+            ("3 + (4 + 5 * 8 * 8) * 2 * (9 * (5 * 3 + 8 + 6) * 2 + (5 * 7 * 3) * (4 + 5) + 7)", 6542700),
+            ("6 * (5 * 4) * 5 + 4 + (6 + 2) + 6", 618),
+            ("2 * (4 * (7 + 2 + 3 + 3 * 8) * (9 + 3 * 3) + (6 * 8 * 5 * 7) + (6 + 5) + 7) * (3 + 8 + (5 + 4 + 8 + 6) * 3 + 2 + 3) * 8 + (3 * 3) * 9", 292413105),
+            ("(5 + (4 * 8 * 7) + 7 * (7 * 9 + 2 + 5 + 6)) + 4", 17940),
+            ("6 + ((3 + 9) * 4)", 54),
+            ("9 + ((4 + 4 + 5 * 6) * 8) * 2", 1266),
+            ("(4 + 2) * 3 * 3 + 3", 57),
+            ("5 + 2 + (8 + 7 + 5)", 27),
+            ("6 + (7 + 4 * 9 * (6 + 8 * 8 + 3) * 8)", 91086),
+            ("3 + 3 * 6 * 3 + (4 * (2 + 6 * 7) * 8)", 1900),
+            ("7 * 5 + 8 * 7 + (9 + 4 * (7 + 6 + 2 * 7 * 9) + 9 + 9 * 4) + (3 + 6 + 5 * 6 * 4 + 9)", 49858),
+            ("5 + (9 * (5 * 7 * 6 * 8) + (8 * 3) * 6 + (2 + 7 * 8)) * (9 + (5 + 7 * 2 * 6 + 9 + 7) + 4 + 8 * 3) * 7", 345666741),
+            ("(6 + 7 * 7 * 9 * 4) * 3 + (5 + 7) * 7 * 5 * 6", 2066400),
+            ("(9 + 6 * 5 + 3) * (2 + 6 + 6) + 4 * 6 + 3", 6579),
+            ("5 + 8 + ((9 + 8) * (3 * 3 + 8 * 8) * 2 + 3) * 6 * 4", 111360),
+            ("((3 + 9 * 2 * 8 * 7) * 7 * 8 + 3 + 7) * (8 * 9) * 5", 27098640),
+            ("5 + 3 + (4 * 4 * (8 * 8 + 4 * 4) + 4 + 5 * 6) * 4 + 2 + 7", 104705),
+            ("5 + ((6 + 4 + 9 + 3) * 6 + (2 + 4 * 9 + 4 + 7 + 7)) + 4 + 9 * 8", 1776),
+            ("2 + 4 * 7 * 5 * ((5 + 4 + 6) + 4 * 4)", 15960),
+            ("8 * 6 + (4 + 8 * 5 * 6 + 4 * 9) * 9 + (2 + 8)", 29926),
+            ("((8 + 3 * 2 * 6) * (7 + 8 * 8) * 9 + (2 + 5) + 4) * (2 * 9 * 5 + (9 * 4 * 2 + 7 + 8) * 2 + 2) * 6", 304531656),
+            ("4 * ((5 * 5 + 6 * 8 * 5 * 9) + 4 * (3 + 7 * 6 + 4) * 4) + 2 * ((9 + 8 + 9) + 9 * 2) * 8 + 4", 6401885284),
+            ("2 * 8 * 6", 96),
+            ("(7 + (7 + 8 * 9) * 7 + (5 * 8 * 6 * 9 + 6 * 4)) + ((5 + 9 * 6 + 7) + 8 + 7 + (8 * 7 * 4 + 5 + 2) * 5 + (9 + 3 + 9 * 2 * 6 * 3)) * (4 + 5 * 4) + (8 * (5 * 5) * 9 * (3 * 3) + 5) * 4", 1807076),
+            ("(6 + 5 + 5 * 5) * 4 + ((8 + 6 + 8) + 5 + 5 + 7 * 9)", 671),
+            ("9 * (9 * 2 + 4 * 2 * 4)", 1584),
+            ("4 + (6 + 2) * (4 + 2 + 2 * 5) + 2", 482),
+            ("5 * (6 + 8 + 5 * 2 * (7 * 2 + 2))", 3040),
+            ("((7 + 5) * 2 * (3 * 5 * 9)) + 7 * (7 * 5 + 9 * 9 * (5 * 9))", 57861540),
+            ("7 + 5 * (2 * 3 * 4 + 9 * 7 * 9) + (2 + 8 + (3 * 6) * 7 * 7 * (5 * 8 * 7 + 8 * 6 * 9)) * 5", 106811460),
+            ("9 * 3 * ((9 + 7) * 7 * (2 * 9 + 5 * 9 * 7 + 8) + 6 * 6 + 6) * (9 + 7 + 6 + 9 * 7)", 5736816414),
+            ("8 + 9 * 4 * ((7 * 3 + 6 + 6 * 7 + 9) + 8 * 5 * 2)", 168640),
+            ("3 * (3 * (5 + 5 + 5 * 2))", 270),
+            ("4 * 4 * 8 * 6 + (3 + (5 + 5 + 5 + 6 * 6) * 8 * 9 + 9) + 3", 10068),
+            ("(3 + 8) + 4", 15),
+            ("6 + 5 + 3 + ((2 + 5 + 6) + (9 + 5 * 4 * 9) + 6 * 7 + 5)", 3680),
+            ("(6 * 8 * (2 + 2 + 8 + 8 + 2) + 7 + 6 * 3) + ((7 * 3 * 9) + 2 * 4 * 4 + 2) + 5", 6270),
+            ("6 * ((6 * 8 + 3 * 9) + 2 * 9) + 3 * (6 + (3 * 7 * 4) + 4 * (6 * 8 * 3 * 7 + 3 * 8) * 6 * 7) * 6", 4769979979968),
+            ("5 * 8 * (7 * 7 + 4 * 7) + (2 * 4 + (3 * 2 * 4 * 9) + 4 + 2)", 15070),
+            ("(3 * 8) + 3 + 6 + (3 * 3 + 9 * 6 * 8) + 3 + 5", 905),
+            ("((6 + 5 + 7 + 3) * 7 + 9 * 5) + 9 + 2", 791),
+            ("3 + 2 * ((9 + 9) * 8 + 5 * (6 + 4 * 6) + 4 + 7) + 9 + 4 * 4", 179072),
+            ("5 * 6 + (5 + 6 * 8 * 5 * (8 * 2 + 7) * (7 * 6 * 2 * 2 * 7 * 6))", 71406750),
+            ("8 + 4 + 3 + (4 * 7) * 2 * (2 + (3 + 8 + 8 * 2 * 9))", 29584),
+            ("7 + 5 + 3 + ((9 * 9 + 2 * 8 * 6 + 5) * 2) + (3 * 7 + 6 * 4 * (8 * 6 + 8 + 8 + 7 * 3) + (9 + 3 * 8 * 6 + 4)) * (9 * 6 * 9 * 6)", 92078532),
+            ("5 + (2 + (6 * 3 * 3 + 9 * 8 * 8) + 3) + 9 * 6 + 6", 24312),
+            ("6 + (2 + (3 * 5 + 2 + 4)) + 7 * 9 * (8 * 9 * 6)", 139968),
+            ("((4 * 4) + 2 + 7 + (5 + 3 * 2 + 9 + 8 + 4) * 5) * (2 * (6 + 8 * 9 + 7) * 9 + (7 + 5 * 7) * 8) + 6 * 3 * 3", 55309014),
+            ("(7 * 5) * (5 + 3 + 5)", 455),
+            ("(2 * 6 * 9 + 9 + 6) + 9 * 8", 1056),
+            ("6 + (9 + 6 + 7 * 7 * 3 + (9 + 8 + 2 * 3 + 4 + 7)) + 9 * ((2 * 5 + 4 * 6 * 6 * 7) + (6 + 5 * 4 * 5 * 8) + 9) + ((5 + 7) * 5 * 4)", 2887105),
+            ("(7 * 2 + 7 * 8 * (7 + 6)) * 2 * 2 * 2", 17472),
+            ("(6 + 5 * 2 + 3 + 5) * 8 + 4 + 2", 246),
+            ("3 + 4 + 3 + 7 * ((2 * 8 * 8 * 3 + 4 + 4) * 8 * 2 * 9 + 4 + 9)", 959837),
+            ("7 + (5 * (7 * 9 + 7 + 2 * 7) + 9 + 3 + 5 + (8 * 9))", 2616),
+            ("8 * (2 * (8 + 4 * 3) + 7 * 7 + 5 + 8) + 3 + 6 * 8", 36296),
+            ("(8 + 3 * 5) * 6 + 2", 332),
+            ("3 + 8 * ((3 * 8) + 8 + 5)", 407),
+            ("5 * 9 * 5 + ((5 + 6 + 7) + 4) + ((5 + 8 + 3 + 4 + 3) * 8 * 3)", 799),
+            ("7 * (6 + 4 + (7 + 4 + 4 + 6) * 3 * 3 + 2) + 7 + 8 + 4 + 3", 1989),
+            ("2 + ((3 + 8) + 2 + 9 + 4 * 3)", 80),
+            ("4 + 9 * 3 + 9", 48),
+            ("(7 + (7 * 4 + 7) * (6 * 6 * 9 * 4) * (2 + 5 + 8 + 3)) * 3", 2939328),
+            ("(8 + 2 + 4 * 7 * 3) + 2 * ((6 + 2 + 2) + 7 * 8 * 8 * 5 * 8) + 7 + (5 + 8 + 2 * (9 * 9) + 3)", 12883145),
+            ("8 * 2 + 6 * ((5 * 3) * 6 * 2 * (7 * 2 + 4 * 4 + 9)) + 4", 320764),
+            ("4 * 3 * (8 + 7 * (2 + 4 + 7 + 4 + 3)) * 9", 32400),
+            ("7 + (6 + (6 + 2) + 8 + 9 + 3) * (3 + 9 * (3 + 5 + 6 + 7 + 6) + (8 * 8 * 7) + 5 + 8) * 9 * 2 * 8", 4634640),
+            ("3 + 6 * (3 * 5) * (9 + 4 * 3) + (5 * 6 + 3) * 6", 31788),
+            ("6 + (5 * 6 * 7 * (2 * 4) * 9) * 7 * 7 * 6 * ((2 * 6 * 2 + 3) + 7 + 9 * 2 + 6 * 6)", 2454768288),
+            ("(4 * 4 * 2) * (4 + 3)", 224),
+            ("7 * 8 * 9 * 6 * 2 + (8 * (8 + 6 + 6) + 3 + 5 + 2)", 6218),
+            ("(9 + 2 + (8 * 9 * 5 + 7) + 3) * 9 * (7 + 8 + 3 * 4 + 5) + 8 * (5 * 5 + (4 + 5 + 5 * 3 + 8) * 4) + (7 + 3 + 7 + 4)", 79212321),
+            ("8 * (2 * 2 + (8 + 7 * 9 * 2) * (8 * 2 + 5 + 4) * 9 + 8) * 6 + 3 + (4 * 3) * 7", 20717193),
+            ("(5 + 7 + 9 * 6 + 4) * 9", 1170),
+            ("(3 + (5 + 3 + 4) * 3) + 3 + 8 * ((5 * 8 * 6) + (8 + 6 * 4 * 4 + 8) * 8 + 2 * 4 + 7) + (2 * (5 * 5 * 3) * 2 * 9)", 849364),
+            ("(8 + 2 * 8) + 9 * 8 + 7", 719),
+            ("4 * (2 * 3 + 8 + 3 * 5) * ((3 * 3 * 8 + 7) * (7 + 5 + 8) * 6) + (9 * 5) + 8", 3223253),
+            ("7 * (6 * 3) + (7 + 8 + (2 + 5) * 3) + 7 + 6", 205),
+            ("5 + 9 * 2", 28),
+            ("9 * 2 + 8 * (3 * (6 * 7 * 7) * 8) + 9", 183465),
+            ("((2 + 8 + 7 + 6) + 4 * (6 * 5 + 7 * 4 + 5) * 8) * 9 + (7 + 2 * 5 * 5 * 3 * 3) + 3", 299460),
+            ("6 + 3 * 3 + (8 + 4)", 39),
+            ("(8 + (8 * 2) + 4) * 5 * 4 + 5", 565),
+            ("(5 * 5 * 5 * 8 + 8 + 7) + (6 + 9) + 4 * 3 + 4", 3106),
+            ("(3 + (2 * 9 + 2 + 9 + 4) + 2 + (5 + 3 + 2)) * 5 * 3 + 5", 725),
+            ("6 + 3 * ((8 + 7 * 8 * 7 + 9) + 3 + 3 + 9 * (7 + 5 + 9) * 9) + 5 + (7 * 8 + (5 * 7 + 5 * 9 + 4))", 1470089),
+            ("(4 * 9) + 7 * 9", 387),
+            ("(3 + 7) + 2 + (5 * 2 * 4 * 6 + 5)", 257),
+            ("5 * 4 * 2 * ((9 * 4 * 7) * 2 * 3) + 3 + 6", 60489),
+            ("(5 + 2 * 7 * 7) * (4 * (3 * 8 * 2) * 3 * (2 + 3 * 8)) + 4 * 6 + 8 + 7", 47416359),
+            ("7 * 4 + 2 + (6 + 2 * 5 * 2 + 6 * 9) + 7 * 2", 1622),
+            ("8 + (4 * 4 * 7 * 9 + 5 + 6)", 1027),
+            ("(4 + 7 + 8 * 6) + (3 * 5 + 4) + 4", 137),
+            ("6 + 2 + 3 + 2 * 3 + 9", 48),
+            ("6 + ((7 * 6 + 5) + 4 + 9 + (5 + 6 * 6 + 5 * 2 * 9) * (2 * 9)) + 9 + 5 * 2", 48208),
+            ("8 + 3 * 4 * 3 * (3 * 9 * 2)", 7128),
+            ("9 * (7 * 7 * 4) + 3 + (9 + (6 + 6 + 2 + 3 + 5 + 6) * (3 * 7 * 9 * 3) * 6 + 8 * 3)", 379413),
+            ("5 * (9 * 2 + (6 + 2 * 5) + 5)", 315),
+            ("4 + 3 + 9 + 7 + 5 + (3 * (2 + 8 * 6) * 4 + 2)", 750),
+            ("3 * ((2 + 5 + 2 + 6) + 3 + 4 + (7 + 9) * (7 + 8 * 4 + 9) * 3) + 9 + (8 + 6)", 23621),
+            ("8 + 4 * 4 + 7 + ((3 * 9 * 2 + 2 * 8) + (3 + 6 + 2 * 5 * 4 * 8) * 8 * 8)", 141367),
+            ("4 + 4 * ((5 + 3 + 2 * 4 + 7 * 8) * (5 * 6 + 9) + 5 * 3)", 352056),
+            ("7 * 8", 56),
+            ("3 + (5 * 3 + (5 * 9) * 2 + 4) + 2 + 3", 132),
+            ("6 + 8 + 3 + (2 * (6 + 5 + 3 * 8 + 9) * 3 * 9) * (6 * 8)", 314448),
+            ("2 * 9 * 4 * (6 * 2 * 6 * 3 * 8) * 4", 497664),
+            ("6 + (3 * 4 * 7 + 5 * 5 + 2) * 4 + (6 * 5 * (6 + 2 + 9 + 6 * 8) * 2 + 5) + 4", 12861),
+            ("6 * ((6 + 4) + 9 * 5 * 3 + (9 * 5)) * (4 + 2 * 7 * (4 * 9 * 3 * 8) * 4) + 3", 287400963),
+            ("7 * 2 + 6 * (3 * 6 + 6 * 5) * 7 * 7", 117600),
+            ("3 + 8 * (3 * 2 + (9 * 3 + 8 * 7 + 8 + 4) + 6 + 3 + 5) + (6 + 8 + 7 * 3) * 9 * (4 * 3 * 6 + (9 + 9 * 9 * 2 * 6) + 4 + (6 * 4 + 5 + 9 + 9 + 7))", 58051260),
+            ("4 * 8 * (8 * 5 + 3 * 6 * 7 + 9) * 9", 522720),
+            ("8 + 4 * 9 * 4 * 8", 3456),
+            ("(3 * 7 + (5 * 2 + 7 + 5 * 6) + 9 * 5) * 6 + 6 + 2 * 5", 24340),
+            ("(8 + (4 * 8 * 8) * 7) + 4 * 8 * ((4 * 4 * 5) + 8 + 8 + 2) + ((6 * 8) * 8 * 8 * 8 * 2) + 8", 1501128),
+            ("4 * (6 + 2 + 6 + 9 + 7) * 4 + 7 + 9", 496),
+            ("5 + (2 + 6 * 8 + 5) + (6 + (8 + 9 + 5) * 4 * 3) * 4 * 5", 8200),
+            ("9 * 6 + 5 * (4 + 2 + (7 + 9 * 6)) + 5 + 6", 6029),
+            ("8 + ((8 + 3 + 5 + 3 * 8) + 5 + 3) * 4 * 3", 2016),
+            ("2 + (3 + 5 * (8 * 2) + 8 + 5) * 8 + 4 + (8 + (9 + 8) + 8 * 9 * 7) + 9", 3236),
+            ("7 * (4 * 2 + 5) * 8", 728),
+            ("3 + 5 + 7 + (6 + 2 * 7 * 7 * 5) + ((3 * 4 + 8 * 5 + 6) + 4 * 5)", 2525),
+            ("(9 + 6) * 7 * (9 + 3 + 4 * (8 + 8 * 3 + 6 + 8 * 2))", 208320),
+            ("2 + (6 + 5 + (7 * 5 + 5 + 9 + 7 + 6) + 2 + 2 * (8 + 8))", 1234),
+            ("4 * 9 + 2 * 9 + 9 + 8", 359),
+            ("((2 * 7 * 5) * 8) * 8 + 4 + 8 * 4", 17968),
+            ("7 * 5 + (8 + 9) * 3 * 6", 936),
+            ("8 + ((9 + 7 + 8) + (8 * 5) + 2 + 7 + 3 + 3) + 3", 90),
+            ("6 * (5 * (7 + 6 + 5 * 9 + 8 * 5) * 6) + 7 * 9 * ((2 + 5 * 8 * 2 + 3) * 3 + 7 + 5 * 3) * 2", 2949668946),
+            ("3 * (3 + 5 + 4) * 6 * 9", 1944),
+            ("6 + ((8 * 5 + 3 + 9) * (5 + 2 * 4 * 5 + 5) + (2 * 3) + 4 + 7) + 7 + 8 * 6 + 4", 45472),
+            ("((9 * 2 + 8 * 9) * 4 + 5 * 3 * (8 * 2 * 7)) + (7 + 4 * 2 + 6) * 9", 2845836),
+            ("(6 * 5 + 7 * (5 * 5 + 4 + 7 * 7 + 6) + 2) * ((4 + 6 * 5 * 6 + 7) + 9 + 5) * 7 * (4 + 7 * 6 + 5) * 5", 7616296380),
+            ("8 * (3 * 6 + 5) + 9 * (9 + 6 * (4 * 6) + (7 + 8 + 5 + 3)) * (3 * 7 * 8 * 2) + 9", 24836793),
+            ("8 * 3 + (5 + 3) + 8 * 4 + (4 + (7 + 9 * 5 * 3) * 6 + (7 + 5 + 4) + 8 * 8)", 12064),
+            ("2 * 3 + ((8 * 8 * 8 + 4) * 7 * 7) * 5 * 8", 1011600),
+            ("(6 * (7 + 3 + 8 * 5 + 2) + 2 * 4 + 5 * 5) * 2 * (8 + 3 + 3 + (6 + 4) * (9 * 3)) + 6 * 9", 129528774),
+            ("8 * (7 * 6 * 8 * (3 * 6 + 4 + 6 + 2 + 2) * 6) + 8 * 8 * 6", 24772992),
+            ("(7 * 5 * 5) * 7 * ((3 + 6 + 3 + 4 + 2 * 2) * 8 * (7 + 9 * 9 * 9))", 457228800),
+            ("((5 + 7 * 9 * 2 + 7) + 7 + 5 * 6 + 3) * 6 * 2 * 3", 50868),
+            ("5 + (5 * (9 + 9) + (7 * 7 * 4 + 2) * 3)", 869),
+            ("((8 * 8 + 2 + 8 * 9) * 5) + (2 + (9 * 6 + 9 + 7) * 7)", 3834),
+            ("3 + ((7 * 4 * 4 * 5) * (8 + 3 * 4 + 4 * 9) * 5 * 3 + 7) + 4 * 2 * 7 * (3 * 6 * 6)", 5486766768),
+            ("((9 * 7 + 6 + 7 * 9 + 2) * 4 + 3 + 4 + 4 * 6) * 8 + (4 + (8 + 2 * 6 * 4 * 3)) + (5 + 2 * 6 * (4 * 5 + 4 + 2)) + 4 * (6 + 3 * (2 * 2 * 6 * 3) + 8 + 4 * 5)", 442398000),
+            ("(5 * (7 + 9 + 5) + 6) * 5 * (6 + 7 * 9 + 6) * 9 * 5 + 9", 3071934),
+            ("(4 * 4 * 6 * (5 * 8 + 3 + 8) + 5) + (9 * (3 * 9 + 3 * 9) + 5 + 8 + 2 * 3) * 3 * 2 + 8 * 5", 367120),
+            ("7 + 5 * (3 + 8 + 6 * 9 + 5 * 8) * ((9 * 9 * 4 * 9 + 3) * (6 + 9 * 5) * 8 + 4 + 6)", 26565386880),
+            ("7 + 8 * ((3 + 7 * 5) + 3 * 2 + 2 * 3 + 7) * 9 + 8 * 7", 312851),
+            ("3 + 4 + (5 * (9 + 9 + 3 * 6 * 4 * 3) * 4) * (4 * (7 * 6 * 3 + 5 * 2 * 9) + (7 * 3 + 5))", 286076126),
+            ("3 * (2 + 8 + 2) * 6 * (4 * 4)", 3456),
+            ("2 + 2 + 3 * 5 + (3 + (6 + 2) + 9 + 7) * (3 * 3 + 5 + 8 + 7)", 1798),
+            ("4 + 5 + 6 * 6 * 6 + (3 * 2 * 3 * (2 * 6 + 9) + 6 + (5 + 2 + 9 * 6))", 1020),
+            ("((4 + 9) + 2) * 7 + 3 * 4", 432),
+            ("2 + 6 * ((2 * 7 * 8 * 3 + 8 + 4) + 9 + 6 + 9 * 2 + 9) + 7 * 6", 36186),
+            ("9 * 7 + ((2 + 5 * 2 * 7 * 8) + 6 * 2 + 3 + 4) * 5 * (5 + 2 * 7) * 8", 3234000),
+            ("4 * (8 + 5 * 6 * 8) + 2 + 3 * 7", 17507),
+            ("(2 * 2) * 9 * 6 * 3 + 9", 657),
+            ("9 + 2 * (7 + 5 + 7 + (3 + 7 * 2 * 2 + 3) * 3)", 2046),
+            ("(2 + 5 * 9) * (4 * (9 + 2 * 4 + 3 + 2) * 2 + 8 + (6 * 7 + 9 + 5)) * 3 + 8", 86192),
+            ("(6 * (6 + 7 * 7) + 7 * 6 * 7) + ((7 * 6 * 4) * 6 * (8 + 8 + 5 * 7 * 8 + 8) + (4 + 5 * 5 + 5 + 3 * 9) + 8)", 1217183),
+            ("9 * (6 * 9 * (8 * 2 * 6) + 4 * 4)", 186768),
+            ("(5 + 5 * 5 + 8) * 6 + 5 * 2", 706),
+            ("4 + ((8 + 7) + 5) + 6", 30),
+            ("9 + 6 * (7 + 4 + (9 + 4 + 2 + 8)) + (8 * 5)", 550),
+            ("(3 * 8 + (6 + 9 * 8 + 6)) + 3 + 4 * 8 + 5 * 3", 3783),
+            ("3 + 6 * (7 * 8 * 6 * (5 + 8 + 6) + 5 * 4) * ((8 + 9 + 6 * 8) * 9 + 6 * 6 + 2 * 2) * 4", 18352479168),
+            ("7 * (6 * (5 * 5 + 9 * 7 + 5 + 9) + 8 + 9 + 2 * (6 * 7 * 7)) * 3", 9452394),
+            ("4 + 2 * (5 * (3 * 8 * 3) * (5 + 9 + 8 * 9) + 9 + 7) * 7 + 5", 2994437),
+            ("6 * 5 * (5 * 3 * 9 * 4 * 2) * 9 + 7 * 4", 1166428),
+            ("3 * (4 * (7 + 2) + 4 + 6 + (3 + 6 + 6 * 5)) + 5", 368),
+            ("7 * 7 * (5 + 9 + 9) * (8 * 6 * 5 + 4 * 2)", 549976),
+            ("6 + (9 * 4) * ((4 * 2 * 4 * 4 * 6 * 7) + 9 + (2 * 9 + 9 + 9)) + 2 + 4 + 4", 227692),
+            ("9 * (6 * 5 + 9 * 2 * 4) + 7 + 8 * 8 + 9", 22593),
+            ("(6 + 7 + 8 * 2 * 4) * 5 + 2 + 2 * 5 + 6", 4226),
+            ("8 * 7 * (9 * 2 * 4 + 3 + 4 * 4) + (8 * 8 + 9 + 6) + ((7 * 7 + 2 * 9) * (2 * 8 + 2) * 6 * 6) + 8", 315215),
+            ];
+        // Find shortest failures first, that should make it easier to understand.
+        ts.sort_by(|l, r| l.0.len().cmp(&r.0.len()));
+        for (input, want) in ts {
+            let got = parse_part1(&lex(input));
+            eprintln!("got {}, want {} for {}", got, want, input);
+            assert_eq!(got, want, "got {}, want {} for {}", got, want, input);
+        }
+    }
+
+    //#[test]
+    fn comprehensive_part2() {
         let mut ts = vec![
             ("(7 * (3 + 8 + 8 + 7) + (6 + 8 * 2 + 5 + 2 * 6) * (5 + 2) * 9) + ((7 * 4 + 8) * 6 * 8 + 9) * 7 * 2 * 2", 9896040),
             ("6 * ((9 + 4) * (6 * 7 + 5 + 8 * 2))", 18720),
@@ -564,7 +957,7 @@ mod tests {
         // Find shortest failures first, that should make it easier to understand.
         ts.sort_by(|l, r| l.0.len().cmp(&r.0.len()));
         for (input, want) in ts {
-            let got = parse(&lex(input));
+            let got = parse_part2(&lex(input));
             eprintln!("got {}, want {} for {}", got, want, input);
             assert_eq!(got, want, "got {}, want {} for {}", got, want, input);
         }
diff --git a/2020/src/lib.rs b/2020/src/lib.rs
index 39b1f16..6d721d2 100644
--- a/2020/src/lib.rs
+++ b/2020/src/lib.rs
@@ -7,7 +7,7 @@ pub mod day14;
 pub mod day15;
 pub mod day16;
 pub mod day17;
-//pub mod day18;
+pub mod day18;
 pub mod day19;
 pub mod day2;
 //pub mod day20;