Log base 3 of x + y
<math xmlns="http://www.w3.org/1998/Math/MathML"> <apply> <log/> <logbase> <cn>3</cn> </logbase> <apply> <plus/> <ci>x</ci> <ci>y</ci> </apply> </apply> </math>
Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)