$\left(-a-2\right)$

$+8\frac{1}{3}x$

$\frac{1}{2}\left(-\ln\left(y+1\right)+\ln\left(y-1\right)\right)$

$\frac{dy}{dx}=ye^x$

$\frac{\left(cot\left(x\right)+cos\left(x\right)\right)}{\left(sec\left(x\right)+tan\left(x\right)\right)}=cot\left(x\right)cos\left(x\right)$

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

$\left(p^{3k}\right)^2$