$x^2+8x+20$
$-2009-209$
$\int_2^{3b}2xdx$
$cotx+coty$
$\lim_{x\to3}\left(\frac{\sqrt{x+1}-2}{\sqrt{2x+3}}\right)$
$\left(-5\right)^{10}$
$\left(4x\:2\:+m\:2\:y\right)^2$
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