Applicare la formula: $\left(a+b\right)^2$$=a^2+2ab+b^2$, dove $a=\frac{5x}{6}$, $b=-\frac{2}{7}$ e $a+b=\frac{5x}{6}-\frac{2}{7}$

Applicare la formula: $\left(\frac{a}{b}\right)^n$$=\frac{a^n}{b^n}$, dove $a=5x$, $b=6$ e $n=2$

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

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=5$, $b=3$, $c=-2$, $a/b=\frac{5}{3}$, $f=7$, $c/f=-\frac{2}{7}$ e $a/bc/f=\frac{5}{3}\cdot -\frac{2}{7}x$