Answer
$\frac{y}{16x^{ 8}z^{6}}$
Work Step by Step
$(2x^{-3}yz^{-6})(2x)^{-5}=\frac{(2x^{-3}yz^{-6})}{(2x)^{ 5}}=\frac{2y}{32x^{ 5}x^{3}z^{6}}=\frac{y}{16x^{ 8}z^{6}}$
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