Test italic/upright text
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mover>
<mi>xxx</mi>
<mo>¯</mo>
</mover>
<mo>=</mo>
<mover>
<mi mathvariant="italic">xxx</mi>
<mo>¯</mo>
</mover>
</math>
Author: Design Science, Inc. (D. Doyle, R.Miner)