$\lim\:_{x\to\:3}\frac{\sqrt{x-2}-1}{\sqrt{x-3}}$
$\cot\left(x\right)\left(1-\cos\left(2x\right)\right)$
$x^3-x^2-5x+6$
$1^2-4x-21$
$8+3d-5d+7$
$\frac{dy}{dx}=\frac{1}{x^2f^2+1}$
$\frac{x}{-2}-5\le\:-10$
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