Simplify (x6y5z2(xy)1z2)4\displaystyle {\left({\frac{{{x}^{{6}}{y}^{{5}}{z}^{{-{{2}}}}}}{{{\left({x}{y}\right)}^{{1}}{z}^{{-{{2}}}}}}}\right)}^{{-{{4}}}} completely and write your answer without negative exponents.