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

Applicare la formula: $-\left(a+b\right)$$=-a-b$, dove $a=n$, $b=-3$, $-1.0=-1$ e $a+b=n-3$

Applicare la formula: $a+b$$=a+b$, dove $a=1$, $b=3$ e $a+b=3a+1-n+3$