Applicare la formula: $\frac{a^n}{a}$$=a^{\left(n-1\right)}$, dove $a^n/a=\frac{x^{15}y^3z^{12}}{x^3yz}$, $a^n=y^3$, $a=y$ e $n=3$

Applicare la formula: $\frac{a^n}{a}$$=a^{\left(n-1\right)}$, dove $a^n/a=\frac{x^{15}y^{2}z^{12}}{x^3z}$, $a^n=z^{12}$, $a=z$ e $n=12$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=x^3$, $a^m=x^{15}$, $a=x$, $a^m/a^n=\frac{x^{15}y^{2}z^{11}}{x^3}$, $m=15$ e $n=3$