org: Working with MathML or OpenDocument formula files

 
 12.9.8.2 Working with MathML or OpenDocument formula files
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 For various reasons, you may find embedding LaTeX math snippets in an
 ODT document less than reliable.  In that case, you can embed a math
 equation by linking to its MathML (‘.mml’) source or its OpenDocument
 formula (‘.odf’) file as shown below:
 
      [[./equation.mml]]
 
    or
 
      [[./equation.odf]]