\[- 14x^{7}yz^{2} \cdot 1\frac{2}{7}x^{2}y^{9}z^{5} =\]
\[= - 14 \cdot \frac{9}{7}x^{9}y^{10}z^{7} =\]
\[= - 18x^{9}y^{10}z^{7}\]