Applicare la formula: $a^3+b$$=\left(a-\sqrt[3]{\left|b\right|}\right)\left(a^2+a\sqrt[3]{\left|b\right|}+\sqrt[3]{\left|b\right|^{2}}\right)$, dove $a=z$ e $b=-w^3$

Applicare la formula: $\frac{a}{a}$$=1$, dove $a=z-w$ e $a/a=\frac{\left(z-w\right)\left(z^2+zw+w^{2}\right)}{z-w}$