Differentiate `tan^(-1)(x/(1+6\ x^2))` with respect to `x`

Explanation

$$ y=\tan ^{-1}\left(\frac{x}{1+6 x^{2}}\right) $$
Arranging the terms in equation
$$ y=\tan ^{-1}\left(\frac{3 x-2 x}{1+3 x \times 2 x}\right) $$
Using,
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