<<< native
[ EGrouped
    [ EIdentifier "HypergeomDist"
    , ESymbol Ord "\8289"
    , EDelimited
        "("
        ")"
        [ Right
            (EGrouped
               [ EIdentifier "x"
               , ESymbol Pun ";"
               , EGrouped
                   [ EIdentifier "M"
                   , ESymbol Pun ","
                   , EIdentifier "K"
                   , ESymbol Pun ","
                   , EIdentifier "n"
                   ]
               ])
        ]
    ]
, ESymbol Rel "="
, EGrouped
    [ EUnderover
        False
        (ESymbol Op "\8721")
        (EGrouped [ EIdentifier "k" , ESymbol Rel "=" , ENumber "0" ])
        (EIdentifier "x")
    , EFraction
        NormalFrac
        (EGrouped
           [ EDelimited
               "("
               ")"
               [ Right (EFraction NormalFrac (EIdentifier "K") (EIdentifier "k"))
               ]
           , ESymbol Ord "\8290"
           , EDelimited
               "("
               ")"
               [ Right
                   (EFraction
                      NormalFrac
                      (EGrouped [ EIdentifier "M" , ESymbol Bin "-" , EIdentifier "K" ])
                      (EGrouped [ EIdentifier "n" , ESymbol Bin "-" , EIdentifier "k" ]))
               ]
           ])
        (EDelimited
           "("
           ")"
           [ Right (EFraction NormalFrac (EIdentifier "M") (EIdentifier "n"))
           ])
    ]
]
>>> omml
<?xml version='1.0' ?>
<m:oMathPara>
  <m:oMathParaPr>
    <m:jc m:val="center" />
  </m:oMathParaPr>
  <m:oMath>
    <m:r>
      <m:t>HypergeomDist</m:t>
    </m:r>
    <m:r>
      <m:rPr>
        <m:sty m:val="p" />
      </m:rPr>
      <m:t>&#8289;</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>x</m:t>
        </m:r>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>;</m:t>
        </m:r>
        <m:r>
          <m:t>M</m:t>
        </m:r>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>,</m:t>
        </m:r>
        <m:r>
          <m:t>K</m:t>
        </m:r>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>,</m:t>
        </m:r>
        <m:r>
          <m:t>n</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:nary>
      <m:naryPr>
        <m:chr m:val="∑" />
        <m:limLoc m:val="undOvr" />
        <m:subHide m:val="0" />
        <m:supHide m:val="0" />
      </m:naryPr>
      <m:sub>
        <m:r>
          <m:t>k</m:t>
        </m:r>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>=</m:t>
        </m:r>
        <m:r>
          <m:t>0</m:t>
        </m:r>
      </m:sub>
      <m:sup>
        <m:r>
          <m:t>x</m:t>
        </m:r>
      </m:sup>
      <m:e>
        <m:f>
          <m:fPr>
            <m:type m:val="bar" />
          </m:fPr>
          <m:num>
            <m:d>
              <m:dPr>
                <m:begChr m:val="(" />
                <m:endChr m:val=")" />
                <m:sepChr m:val="" />
                <m:grow />
              </m:dPr>
              <m:e>
                <m:f>
                  <m:fPr>
                    <m:type m:val="bar" />
                  </m:fPr>
                  <m:num>
                    <m:r>
                      <m:t>K</m:t>
                    </m:r>
                  </m:num>
                  <m:den>
                    <m:r>
                      <m:t>k</m:t>
                    </m:r>
                  </m:den>
                </m:f>
              </m:e>
            </m:d>
            <m:r>
              <m:rPr>
                <m:sty m:val="p" />
              </m:rPr>
              <m:t>&#8290;</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:f>
                  <m:fPr>
                    <m:type m:val="bar" />
                  </m:fPr>
                  <m:num>
                    <m:r>
                      <m:t>M</m:t>
                    </m:r>
                    <m:r>
                      <m:rPr>
                        <m:sty m:val="p" />
                      </m:rPr>
                      <m:t>-</m:t>
                    </m:r>
                    <m:r>
                      <m:t>K</m:t>
                    </m:r>
                  </m:num>
                  <m:den>
                    <m:r>
                      <m:t>n</m:t>
                    </m:r>
                    <m:r>
                      <m:rPr>
                        <m:sty m:val="p" />
                      </m:rPr>
                      <m:t>-</m:t>
                    </m:r>
                    <m:r>
                      <m:t>k</m:t>
                    </m:r>
                  </m:den>
                </m:f>
              </m:e>
            </m:d>
          </m:num>
          <m:den>
            <m:d>
              <m:dPr>
                <m:begChr m:val="(" />
                <m:endChr m:val=")" />
                <m:sepChr m:val="" />
                <m:grow />
              </m:dPr>
              <m:e>
                <m:f>
                  <m:fPr>
                    <m:type m:val="bar" />
                  </m:fPr>
                  <m:num>
                    <m:r>
                      <m:t>M</m:t>
                    </m:r>
                  </m:num>
                  <m:den>
                    <m:r>
                      <m:t>n</m:t>
                    </m:r>
                  </m:den>
                </m:f>
              </m:e>
            </m:d>
          </m:den>
        </m:f>
      </m:e>
    </m:nary>
  </m:oMath>
</m:oMathPara>