Applicare la formula: $\frac{a^n}{a}$$=a^{\left(n-1\right)}$, dove $a^n/a=\frac{-\frac{3}{5}a^3b^2}{-\frac{4}{5}a^2b}$, $a^n=b^2$, $a=b$ e $n=2$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=a^2$, $a^m=a^3$, $a^m/a^n=\frac{-\frac{3}{5}a^3b}{-\frac{4}{5}a^2}$, $m=3$ e $n=2$

Applicare la formula: $\frac{\frac{a}{b}}{\frac{c}{f}}$$=\frac{af}{bc}$, dove $a=-3$, $b=5$, $a/b/c/f=\frac{-\frac{3}{5}ab}{-\frac{4}{5}}$, $c=-4$, $a/b=-\frac{3}{5}$, $f=5$ e $c/f=-\frac{4}{5}$

Applicare la formula: $\frac{a}{a}$$=1$, dove $a=5$ e $a/a=\frac{-3\cdot 5ab}{5\cdot -4}$