$\lim_{x\to0}\left(\frac{cos\left(x\right)-1}{x^3}\right)$

$\frac{dy}{dx}=3x^8y^8$

$\frac{\left(x^2+2\right)}{\left(x^4-1\right)}$

$\lim_{x\to1}\left(\frac{2x^2-2}{\ln\left(x\right)}\right)$

$6^2+12\left(6\right)$

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

$9\cdot18,9$