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

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

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

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