$\frac{m^2-1}{m^2+m-2}$
$\left(\frac{x+2}{x}\right)^4$
$\frac{ds}{dr}=\frac{lnr\left(s+1\right)}{s}$
$\left(2x^2\:+\:4x\:+\:1\right)^2$
$\int - 13 d x$
$-3+7+1-4+5-12+9$
$x-2\le3$
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