$x^2+56x$
$2x^2\cdot\frac{dy}{dx}=3xy+y^2$
$7\sin\left(x\right)=5$
$\sec\left(x\right)^2+2\csc\left(x\right)^2$
$\lim_{x\to-\infty}\left(\frac{-10x}{x^2-5x}\right)$
$4-2\:\left(5+2\right)$
$-a^2-5a-4=0$
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