Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=2$, $b=1$ e $a/b=\frac{2}{1}$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=1$, $b=3$, $c=2$, $a/b=\frac{1}{3}$ e $ca/b=2\frac{1}{3}mnn^2$

Applicare la formula: $ab$$=ab$, dove $ab=2\cdot 1$, $a=2$ e $b=1$

Applicare la formula: $x\cdot x^n$$=x^{\left(n+1\right)}$, dove $x^nx=\frac{2}{3}mn\cdot n^2$, $x=n$, $x^n=n^2$ e $n=2$

Applicare la formula: $a+b$$=a+b$, dove $a=2$, $b=1$ e $a+b=2+1$