1+2+3+4+5*(6+7-8)+7
12+5*6
if (5+6=11) then (if 5-9=9 && 3+3=6 then 33 else 53-11) else 33+54
3+5+(prInt 33+1)
let x=4 in (let y=x+3 in x*y+14)
let x=prInt 33 in let x=25 in x+17
let f=fun x -> x*2 in let x = 12 in f (f x -3)
(fun x -> fun y -> fun x -> x+y*2) 0 19 4