$x^2\frac{dy}{dx}+xy-\frac{1}{x}=0$
$-355-602$
$6a^2-12a\:\left(x+2\right)$
$\int_{-1}^1\left(\frac{sinx}{x}\right)dx$
$-27\left(-11\right)$
$3x^2-8x+-2x^2+x-3$
$\lim_{x\to0}\left(\frac{2\left(4^x-5^x\right)}{x}\right)$
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