$\frac{dy}{dx}=\frac{2x+sec^2x}{2y}$

$\frac{\left|2\frac{-2}{3}-1\right|-\left|5-\frac{-2}{3}\right|+\left(\frac{-2}{3}\right)^2}{3\frac{-2}{3}-\left|\frac{-2}{3}\right|}$

$18+n=2$

$\int-x^2+6x-5\:dx$

$\frac{2}{\sqrt{1+\frac{1}{2}}}\arctan\left(\sqrt{\frac{1-\frac{1}{2}}{1+\frac{1}{2}}}\tan\left(\frac{x}{2}\right)\right)$

$2x^2+14x+20$

$-3\sin a=9$