Add math_expression and fix ast2 tests

Update to include more expressions

tests/include/tast2.h

@@ -8,6 +8,24 @@ extern "C" {
 #define D "hello"
 #define E 'c'
 
+#define UEXPR (1234u << 1)
+#define ULEXPR (1234ul << 2)
+#define ULLEXPR (1234ull << 3)
+#define LEXPR (1234l << 4)
+#define LLEXPR (1234ll << 5)
+
+#define SHL1 (1u << 1)
+#define SHL2 (1u << 2)
+#define SHL3 (1u << 3)
+#define COERCE 645635634896ull + -35436
+#define COERCE2 645635634896 + -35436
+#define BINEXPR ~(-(1u << !-1)) ^ (10 >> 1)
+#define BOOL true
+#define MATHEXPR (1 + 2/3*20 - 100)
+#define ANDEXPR (100 & 11000)
+
+#define ALLSHL (SHL1 | SHL2 | SHL3)
+
 struct A0;
 struct A1 {};
 typedef struct A2;