$$e^2-x^2$$

$$\left(2y^3\cdot3y\right)^3$$

$$\int\frac{2x^2-3x+1}{x^3+3x^2}dx$$

$$x^2-3x+7<4x-3$$

$$\frac{7}{7v^2-3v}-\frac{1}{7v-3}=0$$

$$\frac{dy}{dx^2}=\left(\frac{x+2}{x^2-1}\right)$$

$$\frac{4}{\sqrt{x}}+\sqrt{x}=\frac{12}{\sqrt{x}}-\sqrt{x}$$