Aplicamos a regra: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, onde $a^n=y^5$, $a^m=y^8$, $a=y$, $a^m/a^n=\frac{50y^8z^5}{25y^5z^2}$, $m=8$ e $n=5$

Aplicamos a regra: $\frac{a^m}{a^n}$$=a^{\left(m-n\right)}$, onde $a^n=z^2$, $a^m=z^5$, $a=z$, $a^m/a^n=\frac{50y^{3}z^5}{25z^2}$, $m=5$ e $n=2$

Aplicamos a regra: $\frac{ab}{c}$$=\frac{a}{c}b$, onde $ab=50y^{3}z^{3}$, $a=50$, $b=y^{3}z^{3}$, $c=25$ e $ab/c=\frac{50y^{3}z^{3}}{25}$