$$\left(x^{4}+2x-4\right):\left(x+3\right)$$

$$15-\left(-3\right)-\left(-12\right)$$

$$\frac{x^2}{1-x^3}$$

$$4x^2-56x+49$$

$$\left(4x+3p\right)^3$$

$$\lim_{x\to\infty}\left(\frac{ln\left(1+2e^x\right)}{x}\right)$$

$$\frac{dy}{dx}=\sqrt{x^4}+2$$