$\frac{x^2-x}{3x-9}+\frac{x^2-2x+1}{18-2x^2}$
$\int\:\:e^{-x}\:dx$
$x^2+13x-32=0$
$4a\left(x\right)+6a\left(x\right)$
$\int\frac{x^2}{-x^2+a}ydx$
$\ln x+\ln\left(x-4\right)=0$
$-12x^2+96x+100$
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