$\lim_{x\to\infty}\left(\frac{1-4x^2}{x+\sqrt{x^2+3}}\right)$
$-1^2+5$
$n^2+28n-29$
$\frac{dy}{dx}=y^{3x-1}$
$y'+y\cos x=4\cos x$
$\left(3a-2y\right)^3$
$\left(4x-10\right)\left(2x+3\right)$
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