$a3-4a^2-3a+6$
$\int\left(2cos^2x\right)dx$
$\left(d^2-4d+4\right)y=e^x$
$\left|6\right|-7$
$\sqrt{-200}$
$4y^2+16y=0$
$\lim_{x\to1}\left(\frac{\tan\left(ax\right)}{\tan\left(bx\right)}\right)$
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