Applicare la formula: $x^a$$=\frac{1}{x^{\left|a\right|}}$, dove $a=-2$ e $x=y$

Applicare la formula: $x^a$$=\frac{1}{x^{\left|a\right|}}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=1$, $b=x^{4}$, $c=1$, $a/b=\frac{1}{x^{4}}$, $f=y^{\left|-2\right|}$, $c/f=\frac{1}{y^{\left|-2\right|}}$ e $a/bc/f=\frac{1}{x^{4}}\frac{1}{y^{\left|-2\right|}}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=1$, $b=x^{4}$, $c=1$, $a/b=\frac{1}{x^{4}}$, $f=y^{2}$, $c/f=\frac{1}{y^{2}}$ e $a/bc/f=\frac{1}{x^{4}}\frac{1}{y^{2}}$