#### Answer

$x^{4}$

#### Work Step by Step

=$x^{-3-(-7)}$=$x^{-3+7}$=
$x^{4}$

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

$x^{4}$

=$x^{-3-(-7)}$=$x^{-3+7}$=
$x^{4}$

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