test of long arrow
<math xmlns="http://www.w3.org/1998/Math/MathML"> <mi>H</mi> <mover> <mo>→</mo> <mtext>This is a long stretched arrow</mtext> </mover> <mi>H</mi> </math>
Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)