http://www.microsoft.com/downloads/en/details.aspx?FamilyID=9caca722-5235-401c-8d3f-9e242b794c3a

Here comes a bonus plugin that helps to use Mathematics equations on Words or Onenote.

http://download.microsoft.com/download/4/6/4/46470FC8-1E82-409E-B79F-DD261CF09541/MASetup.exe