$3x\left(2x^2-5x+7xy\right)$
$\left(\tan^2a+1\right)\sin^2a=\tan^2a$
$9\cdot g+39>84$
$\frac{cosx\:cscx}{tanx}$
$8+5\:.\:\:\left|\left(-2\right)-\left(+5\right).\left(-2\right)\right|$
$\frac{d}{dx}in\frac{x}{y}$
$1^2-12x+1$
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