Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n={\left(-5\right)}^{-6}$, $a^m={\left(-5\right)}^5$, $a=-5$, $a^m/a^n=\frac{{\left(-5\right)}^5}{{\left(-5\right)}^{-6}}$, $m=5$ e $n=-6$

Applicare la formula: $a^b$$=a^b$, dove $a=-5$, $b=11$ e $a^b={\left(-5\right)}^{11}$