To simplify this expression, we first simplify each term within the parentheses.
(x^8/x^2)^2 = (x^(8-2))^2 = (x^6)^2 = x^(6*2) = x^12
(x^8/x^4)^4 = (x^(8-4))^4 = (x^4)^4 = x^(4*4) = x^16
So, the expression simplifies to:
(x^12) * (x^16) = x^(12+16) = x^28