$2x^2+4x-5$
$9-\left(x-y\right)^2$
$1+\sqrt{121}$
$49a^{10}-225b^4$
$\frac{1+m^8}{1+m}$
$\int\frac{2}{x^2\sqrt{64+x^2}}dx$
$\lim_{x\to-2}\left(3x^2+5x-9\right)$
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