$\lim_{x\to0}\left(\frac{e^x+sin\left(x\right)}{sin\left(x\right)+x\cdot cos\left(x\right)}\right)$

$5x<5x+4$

$\lim_{x\to\infty}\left(\frac{1}{x}\right)^{\frac{1}{2x}}$

$\frac{2}{\sqrt{3}}\arctan\:\left(\frac{1}{\sqrt{3}}\left(2\tan\:\left(\frac{x}{2}\right)+1\right)\right);\:x=\frac{\pi}{2};\:y=0$

$\int\frac{2}{sec\:2x}dx$

$\left(x-7\right)+7\left(x-7\right)+6$