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 multiplying(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 do some math with just functions!"

age=add(30,5)
height=subtract(78,4)
weight=multiplying(90,2)
iq=divide(100,2)

print "Age,%d, Height:%d, Weight:%d, IQ: %d" %(age,height,weight,iq)

print"Here is a puzzle"

what=add(age,subtract(height,multiplying(weight,divide(iq,2))))

print "That becomes:",what,"Can you do it by hand?"
print "a "+str(what)+" b" 