Applicare la formula: $\left(\frac{a}{b}\right)^n$$=\frac{a^n}{b^n}$, dove $a=7$, $b=25$ e $n=\frac{1}{2}$

Applicare la formula: $a^b$$=a^b$, dove $a=25$, $b=\frac{1}{2}$ e $a^b=\sqrt{25}$

Applicare la formula: $\frac{a}{b}c$$=\frac{ca}{b}$, dove $a=\sqrt{7}$, $b=5$, $c=5$, $a/b=\frac{\sqrt{7}}{5}$ e $ca/b=5\cdot \left(\frac{\sqrt{7}}{5}\right)$

Applicare la formula: $\frac{a}{a}$$=1$, dove $a=5$ e $a/a=\frac{5\sqrt{7}}{5}$