def addition(x, y):
	return x + y
def subtraction(x, y):
	return x - y
def multiplication(x, y):
	return x * y
def division(x, y):
	return x / y
def addition(x, y):
	return x + y
def subtraction(x, y):
	return x - y
def multiplication(x, y):
	return x * y
def division(x, y):
	return x / y