If x and y are positive integers with x y=6, the sum of all of the possible values of \frac{2^{x+y}}{2^{x-y}} is
Answer Choices
A. 4180
B. 4160
C. 4164
D. 4176
E. 4128
If x and y are positive integers with x y=6, the sum of all of the possible values of \frac{2^{x+y}}{2^{x-y}} is
Answer Choices
A. 4180
B. 4160
C. 4164
D. 4176
E. 4128