def addition(a,b):
    return a+b
def subtraction(a,b):
    return a-b
def multiplication(a,b):
    return a*b
def division(a,b):
    return a/b
def addition(a,b):
    return a+b
def subtraction(a,b):
    return a-b
def multiplication(a,b):
    return a*b
def division(a,b):
    return a/b