<<< 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"))
           ])
    ]
]
>>> tex
{{HypergeomDist}\left( {x;{M,K,n}} \right)} = {\sum\limits_{k = 0}^{x}\frac{\left( \frac{K}{k} \right)\left( \frac{M - K}{n - k} \right)}{\left( \frac{M}{n} \right)}}