Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=x^2$, $a^m=x^4$, $a=x$, $a^m/a^n=\frac{x^4y^5}{x^2y^2}$, $m=4$ e $n=2$

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