$3x-8\ge2x+9$
$\lim_{x\to3}\left(x^2+2x-7\right)$
$x-\sqrt{x}=2$
$\int_{-3}^{\sqrt{3}}\left(\frac{6}{x^2+9}\right)dx$
$x-7>-1$
$y=7x^2-98x+343$
$\left(5j+9k\right)\left(5j-9k\right)$
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