$3x^2-12x-23=0$
$23x=92$
$\left(\left(-16\right)+\left(-2\right)\right)-\left(-17\right)$
$\frac{2a-5b}{\sqrt{a}+\sqrt{3b}}$
$x^2-16+63$
$\left(ab+3\right)\left(3-ab\right)$
$3a^2-5a-2$
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