$\frac{x^{2}+3x+2}{\sen\left(x+1\right)}$

$\left(1+\frac{3k}{n}\right)^2$

$-y^2=y-2$

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

$\frac{dy}{dx}=\frac{\left(9x+6\right)y^{\frac{1}{3}}}{x}$

$3a^2+7a+3$

$\cos\left(\frac{27\pi}{10}\right)\cos\left(\frac{19\pi}{20}\right)+\sin\left(\frac{27\pi}{10}\right)\sin\left(\frac{19\pi}{20}\right)$