Perform the following by the indicated operations. Express the resu...

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Perform the following by the indicated operations. Express the result in the form \( \mathrm{x}+\mathrm{iy} \), where \( x, y \) are real numbers \( i=\sqrt{-1} \) :
\[
(2+7 i)^{3}
\]
\( \mathrm{P} \)
W
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