\[\frac{17a^{6}b^{10}}{16c^{2}d^{5}}\ :\ \frac{34a^{4}b^{4}}{24c^{6}d^{6}}\ :\frac{15b^{8}d^{4}}{8a^{8}c^{3}} =\]
\[= \frac{17a^{6}b^{10} \cdot 24c^{6}d^{6} \cdot 8a^{8}c^{3}}{16c^{2}d^{5} \cdot 34a^{4}b^{4} \cdot 15b^{8}d^{4}} =\]
\[= \frac{2a^{10}c^{7}}{5b²d³}\]