((64^4)^2)/((8^2)^7))

(64^4)^2/(8^2)^7

64^(4*2)/64^7

64^8/64^7

64^(8-7)

64^1=64

(64^4)^2 / (8^2)^7  simplify

64 ^8 / 8^14       note, 64 = 8^2

(8^2)^8 / 8^14  =

8^16 / 8^14 =

8^(16 - 14)  =

8^2 =

64