# How do I add mathematical notation in the Rich-Text Editor?

You can embed mathematical notation in the Rich-Text Editor in one of the following ways:

- If LaTeX has been enabled in the site and tool where you are working, you can add mathematical notation using LaTeX (this method is recommended for accessibility).
- Alternatively, you can use the
**MathML**button in the Rich-Text Editor to insert an image with mathematical notation. MathML images also need appropriate text alternatives for accessibility. For more information about authoring text alternatives, see How can I make images more accessible?

## Add mathematical notation using LaTeX.

For LaTeX expressions to display correctly, LaTeX must first be enabled in a specific site and tool. Instructors or site administrators can enable LaTeX in their sites by following the steps in the Help article How do I enable and use LaTeX in my site?

If LaTeX is enabled in the tool where you are working, and you enter a properly formatted LaTeX expression in the Rich-Text Editor, the appropriate symbol(s) or formula(s) will be rendered in your published content.

### Enter the LaTeX expression in the editor.

Type or paste your LaTeX expression in the editor, surrounding the expression with **$$**. Here are a few examples of LaTeX expressions properly formatted for use in the editor:

$$x=\frac{1+y}{1+2z^2}$$

$$\int_0^\infty e^{-x^2} dx=\frac{\sqrt{\pi}}{2}$$

$$\sqrt{2} \sin x$, $\sqrt{2}\,\sin x$$

### View mathematical expression in posted item.

After you **Save **or** Post **the item you were creating in the editor, the published item displays the LaTeX as a rendered mathematical expression.

## Add mathematical notation using MathML.

The **MathML** button allows you to insert an image with math symbols or formulas.

### Position your cursor in the editor.

Place your cursor at the position in the editor where you want the mathematical notation graphic to appear.

### Select the Add MathML Formula icon.

The **Add MathML Formula** icon displays a Greek letter sigma in a gray box.

### Select formula(s) or symbol(s) in the MathML Editor window.

The *MathML Editor* window pops up.

- Using the buttons in the
**MathML Editor**, select the symbol(s) or formula(s) to enter. - Select
**OK**to add the symbol(s) or formula(s) into the editor.

### View formula(s) or symbol(s).

The symbol(s) or formula(s) will be inserted into the editor as an image.

**Important:** For accessibility, you will need to add a meaningful text alternative for the image with the formula. The type of text needed (**Alternative Text** and/or a longer description)** **will depend on the complexity of the image. For instructions to add text alternatives, see How can I make images more accessible?