$3x^2-9x-5y-2=0$
$x^2-12x-4=5$
$8n\log\left(n\right)=2n^2$
$12-\left(-1\right)\cdot8$
$\frac{cosx}{sinx}\left(sec^2x-1\right)$
$32\:+\:875$
$\left(-4\right)\cdot\left(-5\right)+\left(-3\right)$
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