$\frac{d}{du}\left(arc\:cot\left(u^2\right)\right)\left(5^{u-3}\right)$
$x+5=14-\frac{1}{2}x$
$-7\left(3b^2+b+3\right)$
$\lim_{x\to\infty}\left(\frac{1-6x+3x^2}{6x^3-4x^2-3x-12}\right)$
$\int\frac{1}{4}\left(3x-2\right)e^{-\frac{x}{4}}dx$
$9^2-5\left(9\right)-36$
$-\frac{250mn2q}{-50q}$
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