Simplify the following expression. Use positive exponents only.
(−2x−1y−1)−4(x4y4z4)−2\displaystyle \frac{{\left(-{2}{x}^{{-{{1}}}}{y}^{{-{{1}}}}\right)}^{{-{{4}}}}}{{\left({x}^{{4}}{y}^{{4}}{z}^{{4}}\right)}^{{-{{2}}}}}(x4y4z4)−2(−2x−1y−1)−4
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