$\lim_{x\to-1}\:x^3+2x+5$
$\left(-6\right)-\left(-0\right)$
$y'=\left(x+y+2\right)^2$
$\left(-563\right)-\left(-286\right)$
$x^2-4-x^2-4$
$x^2+2x-35<0$
$7\left(6t\right)$
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