$$\frac{x^3+5x^3-10}{x+1}$$

$$\lim_{x\to2}\left(\frac{x-2\cos\left(\pi2\right)}{x^2-4}\right)$$

$$\int\left(x^4+x^2\right)^9\left(4x^3+2x\right)dx$$

$$\lim_{x\to a}\left(7x^2-7ax+4\right)$$

$$8a^2-24a-6$$

$$\frac{d}{dx}\sqrt[3]{9x^2+4}$$