MAYBE
0.07/0.18	MAYBE
0.07/0.18	
0.07/0.18	Problem:
0.07/0.18	 sum(0()) -> 0()
0.07/0.18	 sum(s(x)) -> +(sqr(s(x)),sum(x))
0.07/0.18	 sqr(x) -> *(x,x)
0.07/0.18	 sum(s(x)) -> +(*(s(x),s(x)),sum(x))
0.07/0.18	
0.07/0.18	Proof:
0.07/0.18	 Open
0.07/0.18	EOF