$\lim_{x\to\infty}\left(\frac{2e^x}{1+e^x}\right)$
$\left(wy+z^3\right)\left(wz^2-yx^2w^3\right)$
$\int x^2\cos\left(5x^3-1\right)dx$
$-875+-745$
$_{\left(3x-6\right)\left(3x+6\right)}$
$\:y'\:+\:y^2\:-\:y\:=\:0$
$-x\left(x+7\right)$
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