How to input mathematical notation

Use the visual and LaTeX math editor
You can click on the math symbol in the toolbar x^2y and compose both inline and new line equations (numbered) both using a visual editor with many math symbols or via a LaTeX math editor with preview. Read more about it here.

Note: to number your equation, select NEW LINE in the equation editor. The number will appear when you quit editing, e.g. when you click on a different part of the document or when you enter preview mode.



Insert equations in a LaTeX block
If you want to write more complex math, insert a LaTeX snippet in your document To insert a LaTeX block, click on Insert -> LaTeX. In the LaTeX block, you can insert an inline formula by typing the equation inside $..$ . For example, type: An inline equation is $e=mc^2$.

To obtain a numbered formula, you need to use the {equation} environment. For example, type:
\begin{equation}
\label{eq:sedov}
R(t)= A \left(\frac{E_0}{\rho_0}\right)^{1/5}t^{2/5}
\end{equation}

Click outside of the LaTeX block (or on another block in the document) to render the LaTeX equation:


If you label it with an eq: label, you will then be able to reference it using the reference tool.

Further reading

How To Write Mathematical Equations, Expressions, and Symbols with LaTeX

How To Write Advanced LaTeX

Mathematics with LaTeX: some basic examples

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