int1

integral of f(x)

W3C sample	WIRIS
	$x f x$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <int/>
    <bvar>
      <ci>x</ci>
    </bvar>
    <apply>
      <fn>
        <ci>f</ci>
      </fn>
      <ci>x</ci>
    </apply>
  </apply>
</math>

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