Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n={\left(-4\right)}^5$, $a^m={\left(-4\right)}^8$, $a=-4$, $a^m/a^n=\frac{{\left(-4\right)}^8}{{\left(-4\right)}^5}$, $m=8$ e $n=5$

Applicare la formula: $a^b$$=a^b$, dove $a=-4$, $b=3$ e $a^b={\left(-4\right)}^{3}$