def add(a, b):
	return a + b

def sub(a, b):
	return a - b

def div(a, b):
	return a / b

def mul(a, b):
	return a * b

print div(mul(sub(add(1, 2), 2), 3), 2.0)
def add(a, b):
	return a + b

def sub(a, b):
	return a - b

def div(a, b):
	return a / b

def mul(a, b):
	return a * b

print div(mul(sub(add(1, 2), 2), 3), 2.0)