$x\left(x-2\right)=15$
$34-65+89+88-765$
$\frac{dy}{dx}+3y=x^2+2x$
$\frac{x^2+2xy+y^2}{x^24xy+3y^2}$
$\lim_{x\to1}\left(\ln\left(x\right)\right)\left(tan\left(\frac{\pi x}{2}\right)\right)$
$-x^2-2x-4$
$1050+6-49-12-7-2$
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