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

$\int\left(sen\left(nx\right)\right)dx$

$\frac{x-3}{x-2}\ge x$

$\lim_{x\to\pi}\left(\frac{\left(x\cdot sin\left(x\right)\right)}{x-\pi}\right)$

$14+12w=-16+9w$

$\lim_{x\to0}\left(\frac{sin\left(x\right)-tan\left(x\right)}{e^x+e^{-x}-2}\right)$

$\left(x-0\right)^4$