Applicare la formula: $a+\frac{b}{c}$$=\frac{b+ac}{c}$, dove $a=\frac{x}{2}$, $b=1$, $c=6$, $a+b/c=\frac{x}{2}+\frac{1}{6}$ e $b/c=\frac{1}{6}$

Applicare la formula: $a\frac{b}{c}$$=\frac{ba}{c}$, dove $a=6$, $b=x$ e $c=2$

Applicare la formula: $\frac{ab}{c}$$=\frac{a}{c}b$, dove $ab=6x$, $a=6$, $b=x$, $c=2$ e $ab/c=\frac{6x}{2}$

Applicare la formula: $\frac{a}{\frac{b}{c}}$$=\frac{ac}{b}$, dove $a=6x^3+2x^2-9x-3$, $b=1+3x$, $c=6$, $a/b/c=\frac{6x^3+2x^2-9x-3}{\frac{1+3x}{6}}$ e $b/c=\frac{1+3x}{6}$