const n:int = 42

fun inc(a:int) returns (o:int)
let
  o = a + 1;
tel

fun f1(a:int^n) returns (o:int^n)
let
  o = map<<n>> inc (map<<n>> inc (a));
tel

fun f2(a,b:int^n) returns (o:int^n)
let
  o = map<<n>> (+) (map<<n>> inc (b), map<<n>> inc (a));
tel

fun f3(a,b:int^n) returns (o:int^n)
let
  o = map<<n>> (+) (b, map<<n>> inc (a));
tel