span.test

<<< native
[ EIdentifier "Y"
, EOver False (ESymbol Op "\8592") (EIdentifier "f")
, EIdentifier "X"
, EOver False (ESymbol Op "\8594") (EIdentifier "g")
, EIdentifier "Z"
]
>>> omml
<?xml version='1.0' ?>
<m:oMathPara>
  <m:oMathParaPr>
    <m:jc m:val="center" />
  </m:oMathParaPr>
  <m:oMath>
    <m:r>
      <m:t>Y</m:t>
    </m:r>
    <m:limUpp>
      <m:e>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>←</m:t>
        </m:r>
      </m:e>
      <m:lim>
        <m:r>
          <m:t>f</m:t>
        </m:r>
      </m:lim>
    </m:limUpp>
    <m:r>
      <m:t>X</m:t>
    </m:r>
    <m:limUpp>
      <m:e>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>→</m:t>
        </m:r>
      </m:e>
      <m:lim>
        <m:r>
          <m:t>g</m:t>
        </m:r>
      </m:lim>
    </m:limUpp>
    <m:r>
      <m:t>Z</m:t>
    </m:r>
  </m:oMath>
</m:oMathPara>