$\lim_{x\to\infty }\left(\frac{\sqrt[3]{6x^2-x^3}+x}{2.1}\right)$

$\frac{d}{dx}\left(\arcsin\left(4x^2\right)\right)$

$\frac{d^2}{dx^2}\left(x\cdot\cos\left(x\right)\right)$

$\frac{d}{dx}\left(\arctan\left(3x\right)\right)$

$\frac{d}{dx}\left(\arcsin\left(3x\right)\right)$

$\frac{d}{dx}\tan\left(x\right)$

$\frac{d}{dx}\left(\arcsin\left(4x\right)\right)$

$\frac{d}{dx}\left(\arctan\left(2x\right)\right)$