Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=x^7$, $a^m=x^9$, $a=x$, $a^m/a^n=\frac{12x^9y^{10}}{4x^7y^5}$, $m=9$ e $n=7$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=y^5$, $a^m=y^{10}$, $a=y$, $a^m/a^n=\frac{12x^{2}y^{10}}{4y^5}$, $m=10$ e $n=5$

Applicare la formula: $\frac{ab}{c}$$=\frac{a}{c}b$, dove $ab=12x^{2}y^{5}$, $a=12$, $b=x^{2}y^{5}$, $c=4$ e $ab/c=\frac{12x^{2}y^{5}}{4}$