\( \frac{\left(2 \cdot z^{-4} \cdot y^{3}\right)^{-5}}{\left(2 \cdot y^{-2} \cdot z^{3}\right)^{4}}= \)
\( =\frac{1}{\left(2 \cdot y^{-2} \cdot z^{3}\right)^{4} \cdot\left(2 \cdot z^{-4} \cdot y^{3}\right)^{5}}= \)
\( =\frac{1}{\left(\frac{2 \cdot z^{3}}{y^{2}}\right)^{4} \cdot\left(\frac{2 \cdot y^{3}}{z^{4}}\right)^{5}}= \)
\( =\frac{1}{\left(\frac{16 \cdot z^{12}}{y^{8}}\right) \cdot\left(\frac{32 \cdot y^{15}}{z^{20}}\right)}= \)
\( =\frac{y^{8} \cdot z^{20}}{16 \cdot z^{12} \cdot 32 \cdot y^{15}}= \)
\( =\frac{z^{8}}{512 \cdot y^{7}} \)