Inline Math

The quadratic formula is $x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$.

Display Math

Euler’s identity:

$$e^{i\pi} + 1 = 0$$

Another Example

The Pythagorean theorem: $a^2 + b^2 = c^2$

And the integral:

$$\int_{-\infty}^{\infty} e^{-x^2} dx = \sqrt{\pi}$$