$-2843-13000$
$\int\:\frac{3x^2+x+1}{5x^3-50x^2+125x}dx$
$\left(b-25\right)\left(b^2+2ba+4a^2\right)$
$\left(2x+1\right)+x+x$
$\frac{d}{dx}\left(2y^2+7x^2-13=0\right)$
$\lim_{x\to\infty}\left(1+\frac{2e^{-x}}{e^x+e^{-x}}\right)$
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