Applicare la formula: $\frac{a}{a}$$=1$, dove $a=y^2$ e $a/a=\frac{42v^9y^2}{7v^5y^2}$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=v^5$, $a^m=v^9$, $a=v$, $a^m/a^n=\frac{42v^9}{7v^5}$, $m=9$ e $n=5$

Applicare la formula: $\frac{ab}{c}$$=\frac{a}{c}b$, dove $ab=42v^{4}$, $a=42$, $b=v^{4}$, $c=7$ e $ab/c=\frac{42v^{4}}{7}$