$\int_{-\infty}^1\left(\frac{1}{\sqrt{1+x^2}}\right)dx$
$\frac{dy}{dx}=0.3x^2+y$
$x^4+x^3y^2$
$-7b^9-5b^8-6b^7$
$x+7\ge0$
$3n\:-\:9\:+\:2n$
$\lim_{x\to1.01}\left(\frac{1-\cos\left(x\right)}{x}\right)$
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