$-\frac{3}{x^2+x-2}$
$12x+11-4$
$1\cdot10^{-15}$
$\frac{-15}{-5}$
$2am+2ap-3bm-3bp$
$\left(-12+45-19\right)+\left(-3+8-9\right)+\left(-7+5-6+12\right)$
$\int_{-10}^0\frac{-8x}{\sqrt{2x+1}}\:dx$
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