$\frac{7}{cos\left(x\right)+1}+\frac{7}{cos\left(x\right)-1}=-14csc\left(x\right)cot\left(x\right)$

$\frac{4x^5-3x^2+x-+1}{2x^3}$

$\frac{dy}{dx}\left(9xy-\frac{y}{9}=\frac{2}{x}\right)$

$\int8sin^2\left(t+\frac{\pi}{12}\right)dt$

$\lim_{x\to\infty}\left(\cos\left(\frac{1}{x}\right)\right)^x$

$x ^ { \frac { x } { x } }$

$-77+-74$