$x2+x-250$
$3u^2-90u+111=0$
$\frac{1}{\sec}=\sin^{2}\cdot\cos^{2}+\cos^{4}$
$\frac{\left(2a^2b^{-1}\right)^2}{12a^{-5}}$
$\int\frac{x^2}{4}-x^2dx$
$\left(x+1\right)+\left(x+2\right)\left(x-2\right)$
$\frac{dp}{dt}=2p-4p^3$
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