Behold a cool new feature for AbiWord-2.8
Click to see the image in it's full glory.
The source *.abw file is here.
The complete exported *.html is here.
BTW these files are the reference documentation for Itex commands. As you can see, Itex and MathML are very expressive and allow a very wide range of Mathematical expressions. AbiWord supports a significant fraction of Itex but unfortunately not all. We need to work GtkMathView and itex2MML to get complete coverage.