Applicare la formula: $\frac{x^a}{b}$$=\frac{1}{bx^{-a}}$, dove $a=-2$ e $b=z^{-3}$

Applicare la formula: $\frac{x^a}{b}$$=\frac{1}{bx^{-a}}$, dove $a=-3$, $b=z^{-3}x^{2}$ e $x=y$

Applicare la formula: $x^a$$=\frac{1}{x^{\left|a\right|}}$

Applicare la formula: $\frac{a}{\frac{b}{c}}$$=\frac{ac}{b}$, dove $a=5$, $b=1$, $c=z^{3}$, $a/b/c=\frac{5}{\frac{1}{z^{3}}x^{2}y^{3}}$ e $b/c=\frac{1}{z^{3}}$