$$\lim_{x\to\infty}\left(\frac{4-x^2}{8-\sqrt{x^2+5}}\right)$$

$$\left(-1.4\sqrt{1.451584}-2.083333333\ln\left(.672+\sqrt{1.451584}\right)\right)$$

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

$$3x+5\le4-x$$

$$\left(x+3\right)\left(x^2-3x+9\right)-27$$

$$\sqrt[x]{5}\cdot\sqrt[x^2]{5}$$

$$\frac{dy}{dx}=10x+3\sqrt{x}$$