Question

Help me out, please ​

Answer 1

`\left( \cfrac{x^2 y^3}{z^4} \right)^(-2)\implies \left( \cfrac{z^4}{x^2 y^3} \right)^2\implies \left( \cfrac{z^(4\cdot 2)}{x^(2\cdot 2) y^(3\cdot 2)} \right)\implies \cfrac{z^8}{x^4 y^6}`