$2x^2+7x-9=y$

$\frac{d^2}{dx^2}\left(x^{y^z}\right)$

$\frac{dy}{dx}=\frac{x\cdot y}{x^2-1}$

$\int\ln\left(x+\right)dx$

$-37+\left(-28\right)-\left(-45\right)+28+\left(-19\right)-\left(-43\right)+32+\left(-29\right)-18$

$x^2-2\le0$

$\lim_{x\to3}\left(\frac{\left(2x^2-5x-3\right)}{x-4}\right)$