$\frac{d}{dx}\:\frac{3x}{1-x}$
$-12+3\left(-2-5\right)$
$2\left(\frac{1}{6}m+\frac{2}{5}\right)+\frac{3}{5}$
$1+tan^2\:sec^2$
$x+7>18$
$-a^2\:b^8\:-\:c^2$
$f\left(x\right)=\sqrt{\frac{4x+2}{x-2}}$
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