Alternatives:	(mml file)  (full) (simple) (plain) (form) (slideshow)
File:	Presentation/GeneralLayout/mfrac/mfrac3
CVS-ID:
Author:	Wolfram Research
Description:
passed (p) failed (f) not-tested (n) broken-test (b) some parts pass (s)
Sample Rendering:

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Source Code:

<math xmlns="http://www.w3.org/1998/Math/MathML"> 
  <mfrac linethickness="2"> 
    <mfrac> 
      <mi> a </mi> 
      <mi> b </mi> 
    </mfrac> 
    <mfrac> 
      <mi> c </mi> 
      <mi> d </mi> 
    </mfrac> 
  </mfrac> 
</math>