def f1(a):
    b = a + 9.0
    return b

def f2(a):
    b = a - 7.0
    return b

def f3(a):
    b = a * 5.0
    return b

def f4(a):
    b = a / 3.0
    return b

def f5(a):
    b = a ** 2.0
    return b

def f6(a):
    b = a % 10.0
    return b

corpus = [f1, f2, f3, f4, f5, f6]