$\lim_{x\to1}\left(x-\ln\left(x^2+1\right)\right)$
$sec\left(x\right)\csc\left(x\right)-\sec\left(x\right)$
$\frac{1}{2x+5}\cdot\:\frac{dy}{dx}=y$
$216a^2-8b^2$
$\int\frac{6x^2}{5\sqrt{4x^3-3}}dx$
$\left(1-x\right)dy-ydx=0$
$\int\sqrt{x}dy$
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