unary_compose

unary_compose
Creates composition of two unary functions
compose1()  helper function
compose1(f,  g)(x)  is  f(g(x))

binary_compose
Composition of three functions
compose2()  helper function
compose2(f,  g1,  g2)(x1,  x2)  is  f(g1(x1),  g2(x2))