I don't think this is middle school...
(2^8 x 3^-5 x 6^0)^-2 x ((3^-2)/(2^3))^4 x (2^28)
(256 x (1/243))^-2 x ((1/9)/(8))^4 x 268435456
1.05349794239^-2 x (0.01388888888)^4 x 268435456
0.90101623534 x 3.72108862e-8 x 268435456
8.99999997623
9
9 is your answer.
