Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=x^5$, $a^m=x^8$, $a=x$, $a^m/a^n=\frac{x^8y^9}{x^5y^2}$, $m=8$ e $n=5$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=y^2$, $a^m=y^9$, $a=y$, $a^m/a^n=\frac{x^{3}y^9}{y^2}$, $m=9$ e $n=2$