Question

(-2x3y)4

Answer 1

Stop that. If you had understood the one you were doing before you'd be able to do this one easily. Learn first, then do.

Answer 2

basically you are just doing (-2x^3y)times itself 4 times so
)-2x^3y)*(-2x^3y)*(-2x^3y)*(-2x^3y)=32x^12 81y^4 i believe

Answer 3

- if you have thought hence (-2(x^3)y)^4 = 16(x^12)(y^4)