for (\n -> n*3) 5 2 == 486
for (\n -> n*3) (-5) 2 == 2

while (<5) (*2) 1 == 8
while (<5) (*2) 15 == 15

repeat (*2) (<5) 1 == 2
repeat (*2) (>5) 1 == 8

quickExp (2,5) == 32
quickExp (3,4) == 81

towOfHanoi (2,'C','B','A') == [('C','B'),('C','A'),('B','A')]
towOfHanoi ((-2),'A','B','C') == []