tolong dibantu ya kak,itu bilangan berpangkatnya disederhanakan

c. ab/ ( a + b )^-2 = ab × ( a + b )^2
= ab × ( a^2 + 2ab + b^2 )
= a^3y + 2a^2b^2 + ab^3

d. 6m^5 n^2 / ( 2mn )^3 = 3×2m^5 n^2 / 2^3 m^3 n^3
= 3×2m^5 n^2 / 8m^3 n^3
= 3m^5-3 / n^3-2
= 3m^2 / n^1
= 3m^2 / n