Упростите выражения: (z^9)^4/z(z^5)^7.

\[\frac{\left( z^{9} \right)^{4}}{z \bullet \left( z^{5} \right)^{7}} = \frac{z^{36}}{z \bullet z^{35}} = \frac{z^{36}}{z^{36}} = 1.\]