$-16+43-2+67+31-101-45+16$
$1+\frac{2b}{3}+\frac{b^2}{9\left\{\right\}}$
$-\frac{-8}{-2}$
$y^2+50y-336$
$\cot^2x-1=0$
$9x^2-70x+25=0$
$7\left(2+3x\right)+8$
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