$-0.25x^2+2x+11$
$\frac{dy}{dx}=\frac{2x}{\left(x^2+3\right)}$
$\:-13\:\cdot8$
$4x^2-12x+3=0$
$17-4-\left(-6\right)$
$22x^{2}-20x+50$
$7n^2\left(n^4-4n^3-n^2+2n+3\right)$
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