tolong jawab pertanyaan ini

((a^-1 b^2)^3)/(a^9 b^3) = (a^-3 b^6)/(a^-9 b^3)
= a^-3 . b^6 . a^9 . b^-3
= a^-3+9 . b^6+(-3)
= a^6 b^3


(2^3)^4 × (2^3)^-5 = 2^12 × 2^-15
= 2^12+(-15)
= 2^-3

^ = pangkat