$10w^2-13w-3=0$
$-3x-x^2$
$\ln\left(1+x\right)-\ln\left(1-x\right)$
$\left(x^2+7\right)\left(x^2+6\right)$
$\int\left(\frac{e^{-4x^2}-1+4x^2}{x^3}\right)dx$
$-8xy23xy$
$\frac{2}{x+5}-\frac{x}{x-5}=1$
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