91Ó°ÊÓ

Determine whether$x^yâ‹\dots x^z=x^{yz}$ , is sometimes, always or never true. Explain.

Simplify${\left(n^4\right)}^4$ assuming that no variable equal to 0 .

Simplify${\left(z^2\right)}^5$ assuming that no variable equal to 0 .

Simplify${\left(2x\right)}^4$ assuming that no variable equal to 0 .

Simplify${(−2c)}^3$ assuming that no variable equal to 0 .

Simplify$\frac{a^2{n}^6}{a{n}^5}$ assuming that no variable equal to 0 .

Simplify$\frac{−y^5{z}^7}{y^2{z}^5}$ assuming that no variable equal to 0 .

Simplify$\left(7x^3{y}^{−5}\right)\left(4x{y}^3\right)$ assuming that no variable equal to 0 .

Simplify$(−3b^{3}c)\left(7b^2{c}^2\right)$ assuming that no variable equal to0.

Simplify$\left(a^3{b}^3\right){\left(ab\right)}^{−2}$ assuming that no variable equal to0.