$4x^2+9x-9=0$
$\frac{d}{dx}\left(cosh\left(\frac{\pi}{8}\right)\right)$
$w^2-24w-144$
$3x+2\le\:2x+3$
$-3.9\:\cdot\:5\:\frac{5}{9}$
$\frac{340}{4}$
$\left(3x+1\right)\left(2x+6\right)-\left(x+7\right)\left(x-7\right)$
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