Answer
$64x^{6}$
Work Step by Step
Apply rule $\quad(ab)^{n}=a^{n}b^{n}$
$(8x^{3})^{2}=8^{2}(x^{3})^{2}\quad$
Apply rule $\quad (a^{m})^{n}=a^{mn}$
$8^{2}(x^{3})^{2}\quad=64x^{6}$
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