Answer
$4x^{12}y^{2}$
Work Step by Step
... Apply rule $(ab)^{n}=a^{n}b^{n}$
$ (2x^{6}y )^{2}=2^{2}(x^{6})^{2}y^{2}\qquad $... apply rule $(a^{m})^{n}=a^{mn}$
$=4x^{12}y^{2}$
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