def add(x,y):
    return x+y

def subtract(x,y):
    return x-y

def multiply(x,y):
    return x*y

def divide(x,y):
    return x/y

def modulus(x,y):
    return x%y

def power(x,y):
    return x**y

def square(x):
    return x**2

def cube(x):
    return x**3