def add(a,b):
    print ("Adding %d + %d "%(a,b))
    return a+b
def subtract (a,b):
    print ("Subtracting %d - %d "%(a,b))
    return a-b
def multiply(a,b):
    print (" Multiplying %d * %d"%(a,b))
    return a*b
def divide(a,b):
    print (" Dividing %d / %d"%(a,b))
    return a/b
print("Let's just do some math with just functions!")

age = add (30,5)
height = subtract (78,4)
weight = multiply (90,2)
iq = divide (100,2)
print ("Age: %d, Height: %d, Weight: %d, IQ: %d"%(age,height,weight,iq) )

# A puzzle for the extra credit, type it in anyway.

print ("Here is a puzzle ")
what = add ( age,subtract(height,multiply(weight,divide(iq,2))))
print ("That becomes:",what, "Can you do it by hand?")
