rootWebArea
++genericContainer ignored
++++genericContainer
++++++mathMLMath
++++++++mathMLUnderOver
++++++++++mathMLNumber
++++++++++++staticText name='1'
++++++++++++++inlineTextBox name='1'
++++++++++mathMLNumber
++++++++++++staticText name='2'
++++++++++++++inlineTextBox name='2'
++++++++++mathMLNumber
++++++++++++staticText name='3'
++++++++++++++inlineTextBox name='3'