$3x-2\le5$
$9x^2+30x-25$
$\ln x=y$
$\frac{2dy}{dx}=\frac{1}{x+y}-1$
$\lim_{x\to4}\left(\frac{3x^2-2x-12}{x-5}\right)$
$3x^21-241^2$
$1-2\cot\left(x\right)^2$
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