int2

integral (a + x)dx

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <csymbol cd="calculus1">defint</csymbol>
    <apply>
      <csymbol cd="interval1">oriented_interval</csymbol>
      <cn>0</cn>
      <ci>a</ci>
    </apply>
    <bind>
      <csymbol cd="fns1">lambda</csymbol>
      <bvar>
        <ci>x</ci>
      </bvar>
      <apply>
        <csymbol cd="arith1">plus</csymbol>
        <ci>a</ci>
        <ci>x</ci>
      </apply>
    </bind>
  </apply>
</math>

Author: Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)