$$\int\sqrt[6]{x^{18}}dx$$

$$2\left(x+3\right)+3\left(x+1\right)>2$$

$$dr-rdx=0$$

$$\frac{dy}{dx}=\frac{2t+sec^2t}{2u}$$

$$\lim_{x\to+\infty}\left(\frac{2x^4-3x}{x^4+1}\right)$$

$$\frac{d}{dx}\left(\sqrt{\frac{\left(x-1\right)\left(x+1\right)}{3x-4}}\right)$$

$$\left(9-z^2\right)\left(9-3z^2\right)$$