Applicare la formula: $a+\frac{b}{c}$$=\frac{b+ac}{c}$, dove $a=x$, $b=1$, $c=x$, $a+b/c=x+\frac{1}{x}$ e $b/c=\frac{1}{x}$

Applicare la formula: $a+\frac{b}{c}$$=\frac{b+ac}{c}$, dove $a=x^2$, $b=-1$, $c=x$, $a+b/c=x^2+\frac{-1}{x}$ e $b/c=\frac{-1}{x}$

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

Applicare la formula: $\frac{\frac{a}{b}}{\frac{c}{f}}$$=\frac{af}{bc}$, dove $a=-1+x^{3}$, $b=x$, $a/b/c/f=\frac{\frac{-1+x^{3}}{x}}{\frac{1+x^2}{x}}$, $c=1+x^2$, $a/b=\frac{-1+x^{3}}{x}$, $f=x$ e $c/f=\frac{1+x^2}{x}$