$4x\:+\:4-3x\:+\:2$
$3x-6>5x$
$cos\left(tan^{-1}\left(-4\right)\right)$
$3a-30y^2$
$99-45f+36b$
$\frac{28+x^2+5x}{x+6}$
$\frac{12x+10y}{2}$
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