<<< native
[ EUnder
    True
    (EMathOperator "lim")
    (EGrouped
       [ EIdentifier "z"
       , ESymbol Rel "\8594"
       , ESub (EIdentifier "z") (ENumber "0")
       ])
, EIdentifier "f"
, EDelimited "(" ")" [ Right (EIdentifier "z") ]
, ESymbol Rel "="
, EIdentifier "f"
, EDelimited
    "(" ")" [ Right (ESub (EIdentifier "z") (ENumber "0")) ]
]
>>> omml
<?xml version='1.0' ?>
<m:oMathPara>
  <m:oMathParaPr>
    <m:jc m:val="center" />
  </m:oMathParaPr>
  <m:oMath>
    <m:limLow>
      <m:e>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>lim</m:t>
        </m:r>
      </m:e>
      <m:lim>
        <m:r>
          <m:t>z</m:t>
        </m:r>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>→</m:t>
        </m:r>
        <m:sSub>
          <m:e>
            <m:r>
              <m:t>z</m:t>
            </m:r>
          </m:e>
          <m:sub>
            <m:r>
              <m:t>0</m:t>
            </m:r>
          </m:sub>
        </m:sSub>
      </m:lim>
    </m:limLow>
    <m:r>
      <m:t>f</m:t>
    </m:r>
    <m:d>
      <m:dPr>
        <m:begChr m:val="(" />
        <m:endChr m:val=")" />
        <m:sepChr m:val="" />
        <m:grow />
      </m:dPr>
      <m:e>
        <m:r>
          <m:t>z</m:t>
        </m:r>
      </m:e>
    </m:d>
    <m:r>
      <m:rPr>
        <m:sty m:val="p" />
      </m:rPr>
      <m:t>=</m:t>
    </m:r>
    <m:r>
      <m:t>f</m:t>
    </m:r>
    <m:d>
      <m:dPr>
        <m:begChr m:val="(" />
        <m:endChr m:val=")" />
        <m:sepChr m:val="" />
        <m:grow />
      </m:dPr>
      <m:e>
        <m:sSub>
          <m:e>
            <m:r>
              <m:t>z</m:t>
            </m:r>
          </m:e>
          <m:sub>
            <m:r>
              <m:t>0</m:t>
            </m:r>
          </m:sub>
        </m:sSub>
      </m:e>
    </m:d>
  </m:oMath>
</m:oMathPara>