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

$\int\:\:e^{\left(x\cdot\:\:e^x+senhx\right)}\cdot\:\left(1\cdot\:\:e^x+x\cdot\:\:e^x\:+\:coshx\right)$

$\frac{12x^2+12xy+3y^2}{2}$

$\frac{dy}{dx}=\frac{2x}{y\left(x\right)^2}$

$\int5x^{-7}dx$

$\left(-256\right)+\left(-149\right)+\left(318\right)$

$-16n\:-\:14n$