rec-compose3

compose f and g (x)

W3C sample	WIRIS
	$(f\circ g)(x)$

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

Author: MathML 2 Recommendation