$\frac{d}{dx}\left(arctan\left(1+2x+3x^2\right)\right)$
$-3\cdot2^2-5\cdot2+4$
$2x-x^2+2-7x+5x^2+3x-8$
$-3\left(30-20w\right)$
$14y-25y-y-12y-45y$
$-5899-66$
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