Applicare la formula: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, dove $a^n=x^{10}$, $a^m=x^{15}$, $a=x$, $a^m/a^n=\frac{64x^{15}}{16x^{10}}$, $m=15$ e $n=10$

Applicare la formula: $\frac{ab}{c}$$=\frac{a}{c}b$, dove $ab=64x^{5}$, $a=64$, $b=x^{5}$, $c=16$ e $ab/c=\frac{64x^{5}}{16}$