$x^2\:y\:dx+xdy$
$\frac{2}{2^2-2x+5}$
$\int\frac{4x-1}{16x^2+56x+65}dx$
$4p^2-100$
$3a-4a+5a-7a+12a$
$\sin\left(2x\right)+\frac{x}{2}=\frac{\frac{\sin\left(2x\right)}{2}+x}{2}$
$\lim_{x\to2}\left(\frac{x^2+x-2}{x^2-4}\right)$
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