Fundamental Content Elements


Number
  <cn type="complex-cartesian">
    3<sep/>4
  </cn>
Variable (much like <mi>)
  <apply>
    <ci>F</ci>
    <ci>x</ci>
  </apply>
Apply construct
Numeric interval
  <interval closure="open-closed">
    <cn>3</cn><cn>4</cn>
  </interval>
Predefined functions and operators
  <apply><laplacian/>
    <ci>f</ci>
  </apply>
Inverse function
  <apply>
    <apply><inverse/><sin/></apply>
    <ci>x</ci>
  </apply>