If 2x=a2^x = a2x=a and 2y=b2^y = b2y=b, what is 2x+2y2^{x+2y}2x+2y in terms of aaa and bbb?
ab2ab^2ab2
a+b2a + b^2a+b2
a2ba^2ba2b
a+2ba + 2ba+2b