$\frac{4x^2-1}{2x-1}$
$\frac{1}{x}+\frac{2}{3}$
$3x\:+\:4x\:-\:2x$
$\frac{dy}{dx}=-\tan\left(x\right)y+tan\left(x\right)$
$\frac{x\sqrt{x}-a\sqrt{a}}{x-a}$
$-16n=-144$
$\frac{a}{\sin\left(82\right)}+\frac{18}{\sin\left(70\right)}+\frac{c}{\sin\left(28\right)}$
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