I think the OP wants to be able to use Equation Editor, not just insert an
existing equation. This is another of those times when either using Word's
Help file or Google would have answered the question in moments.
This is from the Word Help file:
If you originally installed Microsoft Office from a network file server or
from a shared folder, you must install Equation Editor from that location.
If you installed Office from a CD-ROM, you must install Equation Editor from
the disc.
1. Quit all programs.
2. Do one of the following:
* If you run Microsoft Windows 2000, double-click the Add/Remove
Programs icon in Control Panel.
* If you run Microsoft Windows XP, click Add or Remove Programs in
Control Panel.
3. In the Currently installed programs box, click the listing for Microsoft
Office or Microsoft Word, depending on whether you installed Word as part of
Office or as an individual program, and then click Change.
4. On the Maintenance Mode Options screen, click Add or Remove Features, and
then click Next.
5. If a Custom Setup screen appears, select the Choose advanced
customization of applications check box, and then click Next.
6. In the list of features to install, click the expand indicator (+) next
to Office Tools.
7. Click the arrow next to Equation Editor, and then click Run from My
Computer.
8. Click Update.
9. Restart Word.
--
JoAnn Paules
MVP Microsoft [Publisher]
~~~~~
How to ask a question
http://support.microsoft.com/KB/555375