Answer
$y' = 28(7x+3)^{3}$
Work Step by Step
1. Use the Chain Rule to find the Derivative
$y = (7x+3)^{4}$
$y' = 4(7x+3)^{(4-1)}(7)$
$y' = 28(7x+3)^{(4-1)}$
$y' = 28(7x+3)^{3}$
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