$\ln\frac{3+2x}{3-2x}$

$\frac{sinx}{1+cosx}+\frac{\left(1+cosx\right)}{sinx}-2cosecx=0$

$\frac{x-3}{\sqrt{4x+x-4}}$

$\int\frac{5x-12}{x\left(x+1\right)}dx$

$-7x^2\:para\:x=-1$

$\lim_{x\to1}\left(\frac{x-1}{sin\left(x\right)}\right)$

$\lim_{x\to0}\left(\frac{1}{2^x}\right)$