## 6.4. Equations

An example is a figure element which has a class attribute containing "role-equation". This kind of figure is listed in the "List of Equations" (that is, book element loe) only if it also has a figcaption child element. Example:

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 

is rendered as:

Few web browsers natively support MathML, so it's recommended to add a link to the MathJax script to your input HTML pages containing equations[1]. This typically done as follows:

<html xmlns="http://www.w3.org/1999/xhtml">
...
[1] Even simpler, add the link to MathJax script to the headcommon element of your book.