
<!DOCTYPE math
  PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
  <factorial/>
  <cn>3</cn>
</apply>

<apply>
  <plus/>
  <cn>3</cn>
  <cn>4</cn>
</apply>

<apply>
  <sin/>
  <ci>x</ci>
</apply>
</math>
