Applicare la formula: $\frac{a}{a}$$=1$, dove $a=s$ e $a/a=\frac{3r^5st^7}{-6rst^3}$

Applicare la formula: $\frac{a^n}{a}$$=a^{\left(n-1\right)}$, dove $a^n/a=\frac{3r^5t^7}{-6rt^3}$, $a^n=r^5$, $a=r$ e $n=5$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=t^3$, $a^m=t^7$, $a=t$, $a^m/a^n=\frac{3r^{4}t^7}{-6t^3}$, $m=7$ e $n=3$

Applicare la formula: $\frac{ab}{c}$$=\frac{a}{c}b$, dove $ab=3r^{4}t^{4}$, $a=3$, $b=r^{4}t^{4}$, $c=-6$ e $ab/c=\frac{3r^{4}t^{4}}{-6}$