Applicare la formula: $a^b$$=a^b$, dove $a=1$, $b=3$ e $a^b=1^3$

Applicare la formula: $ab$$=ab$, dove $ab=- 1$, $a=-1$ e $b=1$

Applicare la formula: $\frac{\frac{a}{b}}{\frac{c}{f}}$$=\frac{af}{bc}$, dove $a=k^3-1$, $b=k+1$, $a/b/c/f=\frac{\frac{k^3-1}{k+1}}{\frac{k^2+kl+l^2}{\left(k+l\right)^2}}$, $c=k^2+kl+l^2$, $a/b=\frac{k^3-1}{k+1}$, $f=\left(k+l\right)^2$ e $c/f=\frac{k^2+kl+l^2}{\left(k+l\right)^2}$