# 9 Math§

https://www.sphinx-doc.org/en/master/usage/restructuredtext/roles.html#math

Inline: $$a^2 + b^2 = c^2$$

https://www.sphinx-doc.org/en/master/usage/restructuredtext/directives.html#math

Block:

\begin{align}\begin{aligned}(a + b)^2 = a^2 + 2ab + b^2\\(a - b)^2 = a^2 - 2ab + b^2\end{aligned}\end{align}

Another block:

$\begin{split}(a + b)^2 &= (a + b)(a + b) \\ &= a^2 + 2ab + b^2\end{split}$

https://www.sphinx-doc.org/en/master/usage/restructuredtext/domains.html#the-math-domain

With label (since Sphinx 1.8):

(9.1)§$e^{i\pi} + 1 = 0$

Euler’s identity, equation (9.1), was elected one of the most beautiful mathematical formulas.