sin x + cos x
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<csymbol cd="arith1">plus</csymbol>
<apply>
<csymbol cd="transc1">sin</csymbol>
<ci>x</ci>
</apply>
<apply>
<csymbol cd="transc1">cos</csymbol>
<ci>x</ci>
</apply>
</apply>
</math>
Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)