$2x-3\le3$

$\lim_{x\to\pi}\left(\frac{1+\cos\left(2x\right)}{1-sen\frac{x}{2}}\right)$

$x+12x+35$

$\frac{dy}{dx}=.1-5\left(\frac{y}{2860}\right)$

$\log_{12}\left(24\right)-\log_{12}\left(6\right)+\log_{12}\left(36\right)$

$3\cdot\left(\frac{1}{2}a+b\right)-3b$

$8x-46<9x+21$