$\left(5b-2c\right)\left(5b+2c\right)$
$\lim_{x\to0}\left(\frac{\sqrt{x+7}-\sqrt{7}}{x}\right)$
$3\left(-1\right)^2+4$
$\frac{5+7x}{3}>8x+2$
$-15+7+6-4+12+8+3-2-1+9$
$\left(x^{-3}\right)^3$
$\frac{dy}{dx}+y=y\left(xe^x+2\right)$
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