Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}$, dove $a=5$, $b=15$ e $a/b=\frac{5}{15}$

Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=\sqrt[3]{d}$, $a^m=\sqrt[9]{d^{5}}$, $a=d$, $a^m/a^n=\frac{-\frac{4}{7}\sqrt[7]{a^{3}}\sqrt[9]{d^{5}}}{\frac{15}{7}\sqrt[13]{a^{7}}\sqrt[3]{d}}$, $m=\frac{5}{9}$ e $n=\frac{1}{3}$

Applicare la formula: $\frac{a^m}{a^n}$$=\frac{1}{a^{\left(n-m\right)}}$, dove $m=\frac{3}{7}$ e $n=\frac{7}{13}$