Pages doesn’t include a built-in equation editor, but you can use the Grapher equation editor that comes with OS X quite effectively (see Figure 6). Any equation written in Grapher can be copied across to Pages, but there are some limitations to this approach. Once pasted into the Pages document, the equation (by default a PDF graphic) isn’t editable, so any necessary changes must be handled in Grapher, and the revised equation copied across again. The only changes you can make to the equation from within Pages are resizing and adjusting the equation’s alignment relative to the page.
A potentially significant problem for academics and scientists is the lack of compatibility between Pages and Word. While Pages will export documents containing equations, those equations are exported as embedded graphics and are no longer editable. Likewise, although Pages will import Word documents with equations, those equations are converted into PDF graphics, optimizing their print quality but making them impossible to edit (or, for that matter, to copy-and-paste into Grapher, where they might be edited). Therefore, Pages is probably of limited value to scientists who need to collaborate with colleagues using Microsoft Word, or who want to submit camera-ready copy to journals as a Word-formatted file.
Figure 6 While Pages lacks a built-in equation editor, you can copy equations from Grapher straight into Pages documents. Be aware, though, that such equations are treated as embedded PDF objects, and can’t be edited within Pages, or any document (such as a Word document) exported from Pages.