Simplify x3(y6z7)2x2y1z8\displaystyle \frac{{{x}^{{3}}\cdot{\left({y}^{{6}}\cdot{z}^{{-{{7}}}}\right)}^{{2}}}}{{{x}^{{-{{2}}}}\cdot{y}^{{1}}\cdot{z}^{{8}}}}

Write your answer with positive exponents only.