$\int_{-\infty\:}^0\left(\frac{1}{1+x^2}\right)dx$
$\:\left(3x\:2\:+\:2x\:-\:1\right)\:d$
$1+x^61-x$
$\left(-98\right)\:+\:38\:-\:\left(-49\right)\:-\:36$
$x2-10x+24=0$
$\left(4x-2x^2\right)^2$
$686x^7-1024x^4$
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