Express the answer to that all exponents are positive?

Question

express the answer to that all exponents are positive on the  following expressions: (12x^3)^-2 and x^-5 y^4/x^8 y^7

Answer 1

(12x³)^-2 = 12^-2x^-6  = 1/(144x⁶)

 

(x^-5y⁴)/(x⁸y⁷) = (x⁸y¹¹)/x⁵ = x³y¹¹