$9=1+x$

$\lim_{x\to\infty}\left(\frac{-e^{\left(2\cdot sqrt\left(2\right)\cdot x\right)}}{1-e^{\left(2\cdot sqrt\left(2\right)x\right)}}\right)$

$\frac{x^3+6x-2}{x+7}$

$\frac{d}{dx}\left(x^{x+e^x}\right)$

$2x+4<6x+1$

$\int\:cos^{\left(5\right)}\:nt\:dt$

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