$$-16-1+15-5\left(3\right)$$

$$\int_3^{\infty}\left(\frac{1}{x\ln\left(x\right)}\right)dx$$

$$x+1\le3x-4$$

$$\lim_{x\to0}\left(\frac{x^3-2x^2+1}{3x^2-6x}\right)$$

$$\frac{dy}{dx}=yx6yx^2$$

$$\frac{dy}{dx}+\frac{y}{x}=\frac{e^x}{x}$$