tolong bantuan nya dong

a. (x^2.y.z^2)^-1 × (x^3.y^2.z)^3
= (x^-2.y^-1.z^-2) × ( x^9.y^6.z^3)
= x^7.y^5.z

b.(a^6.b.^5.c^3)/(a^2.b^4.c^5)
= a^4.b/c^2

c.9^6/3^10.27^4
= 9^6/81^14
= 1/9^-8 = 9^8

d.(y^3)^4 × y^-4/5
= y^12 × y^5/4
= y^ 53/4

e.a^6×a^-2
= a^4