$\int\frac{x^2-3x-4}{x^2-2x-8}dx$
$x^2+2x+50$
$\frac{d}{dx}y=am^2$
$\int_0^x\left(e^{-0.5x}\left(x-1\right)\right)dx$
$3\sin^2\frac{\pi}{12}+3\cos^2\frac{\pi}{12}$
$\frac{\left(-2\right)^{-3}}{\left(\left(-2\right)^{-2}\right)^3.\left(-2\right)^2}$
$81+18x+x^{2}=0$
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