$$2x^2+4x-\frac{2}{2}$$

$$2m^2x+2mx^2-3mx$$

$$\int\frac{\left(30x-10\right)^2}{3x-5}dx$$

$$\frac{x^2+1-2x}{x^4+2x^2+1}$$

$$3+269$$

$$\frac{d}{dx}\left(\left(x-1\right)^2-\left(y-2\right)^2=16\right)$$

$$\frac{dy}{dx}=-\frac{3}{100}\cdot\sqrt{y-18}$$