bisa tolong jawab kah a dan b butuh nih

(16x^2 y^-5 : 3x^-2 y^2)^-3
= 16x^-6 y^15 : 3x^6 y^-6
= 16/3 x^-12 y^21

(8x^-3 y^4 : 5xy^-2)^-2
= 8x^6 y^-8 : 5xy^4
= 8/5 x^5 y^-12


maaf klo salah