Applicare la formula: $\left(-x\right)^n$$=-x^n$, dove $x=yx^3$, $-x=-yx^3$ e $n=\frac{7}{5}$

Applicare la formula: $\left(ab\right)^n$$=a^nb^n$

Applicare la formula: $\left(x^a\right)^b$$=x^{ab}$, dove $a=3$, $b=\frac{7}{5}$, $x^a^b=\sqrt[5]{\left(x^3\right)^{7}}$ e $x^a=x^3$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=7$, $b=5$, $c=3$, $a/b=\frac{7}{5}$ e $ca/b=3\cdot \left(\frac{7}{5}\right)$

Applicare la formula: $ab$$=ab$, dove $ab=3\cdot 7$, $a=3$ e $b=7$