$y'+y=3sin\left(3x\right)$
$\int\:\:xe^{-x}\:dx$
$\sqrt{-17}$
$36q^6-9$
$\lim_{x\to1}\left(\frac{x^2\:+2x+1}{x^2-1}\right)$
$-1+y^2-x+3y^2$
$\left|\left(2x+5y^2\right)^2-\left(x^3-2y\right)^2\right|$
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