$\lim_{x\to0}2\tan\left(x\right)\ln\left(x\right)$

$\frac{1}{\sec}=\sin^{2}\cdot\cos^{2}+\cos^{4}$

$\int3x\sqrt{8+x^2}dx$

$\frac{3y}{2y+2}-\frac{y+2}{2y+2}$

$\lim_{x\to1}\left(2-x\right)^{2tan\left(\frac{\pi}{2}x\right)}$

$x^2-34x-17$

$\lim_{x\to0}\left(\frac{\sin\left(5x\right)+5x}{x}\right)$