$\frac{dy}{dx}x^2+5$

$-10x+41\ge81$

$\lim_{x\to-3}\left(\frac{x^2+2x-3}{x^2+6x+9}\right)$

$\csc\left(x\right)=-\frac{\left(2\sqrt{5}\right)}{3}$

$\left(\frac{2}{5}x\frac{5}{5}\right)$

$\lim_{x\to3}\left(x^2-3x+2\right)\cdot\left(x-3\right)$

$\frac{dy}{dx}\left(y=x-\left(\frac{1}{2x}\right)\right)$