rec-forall2

forall x, x-x=0

W3C sample	WIRIS
	$x x x 0$

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <apply>
    <forall/>
    <bvar>
      <ci>x</ci>
    </bvar>
    <apply>
      <eq/>
      <apply>
        <minus/>
        <ci>x</ci>
        <ci>x</ci>
      </apply>
      <cn>0</cn>
    </apply>
  </apply>
</math>

Author: MathML 2 Recommendation