$ln\left(\frac{\left(x+\sqrt[2]{x^2-4}\right)}{2}\right)$
$6y+8$
$x\frac{dy}{dx}+y=2e^{-x}$
$\frac{1-\cos^2\left(x\right)}{\tan\left(x\right)}$
$3v+5-9$
$-\frac{1}{3}.3\:mn\:.3\:m\:^2$
$\left|-655\:+\:-330\right|$
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