Final answer to the problem
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Step-by-step Solution
Specify the solving method
1
Simplifying
$\frac{d}{dx}\left(\left(d+3e\right)\left(d-3e\right)\right)$
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The derivative of the constant function ($\left(d+3e\right)\left(d-3e\right)$) is equal to zero
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Final answer to the problem
0