Applicare la formula: $\frac{a}{a}$$=1$, dove $a=c$ e $a/a=\frac{5a^mb^nc}{-6a^3b^4c}$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=a^3$, $a^m/a^n=\frac{5a^mb^n}{-6a^3b^4}$ e $n=3$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=b^4$, $a^m=b^n$, $a=b$, $a^m/a^n=\frac{5a^{\left(m-3\right)}b^n}{-6b^4}$, $m=n$ e $n=4$