<<< tex
{}_pF_q(a_1,\dots,a_p;c_1,\dots,c_q;z)
 = \sum_{n=0}^\infty
 \frac{(a_1)_n\cdots(a_p)_n}{(c_1)_n\cdots(c_q)_n}
 \frac{z^n}{n!}


>>> native
[ ESub (EGrouped []) (EIdentifier "p")
, ESub (EIdentifier "F") (EIdentifier "q")
, ESymbol Open "("
, ESub (EIdentifier "a") (ENumber "1")
, ESymbol Pun ","
, ESymbol Ord "\8230"
, ESymbol Pun ","
, ESub (EIdentifier "a") (EIdentifier "p")
, ESymbol Pun ";"
, ESub (EIdentifier "c") (ENumber "1")
, ESymbol Pun ","
, ESymbol Ord "\8230"
, ESymbol Pun ","
, ESub (EIdentifier "c") (EIdentifier "q")
, ESymbol Pun ";"
, EIdentifier "z"
, ESymbol Close ")"
, ESymbol Rel "="
, EUnderover
    True
    (ESymbol Op "\8721")
    (EGrouped [ EIdentifier "n" , ESymbol Rel "=" , ENumber "0" ])
    (ESymbol Ord "\8734")
, EFraction
    NormalFrac
    (EGrouped
       [ ESymbol Open "("
       , ESub (EIdentifier "a") (ENumber "1")
       , ESub (ESymbol Close ")") (EIdentifier "n")
       , ESymbol Ord "\8943"
       , ESymbol Open "("
       , ESub (EIdentifier "a") (EIdentifier "p")
       , ESub (ESymbol Close ")") (EIdentifier "n")
       ])
    (EGrouped
       [ ESymbol Open "("
       , ESub (EIdentifier "c") (ENumber "1")
       , ESub (ESymbol Close ")") (EIdentifier "n")
       , ESymbol Ord "\8943"
       , ESymbol Open "("
       , ESub (EIdentifier "c") (EIdentifier "q")
       , ESub (ESymbol Close ")") (EIdentifier "n")
       ])
, EFraction
    NormalFrac
    (ESuper (EIdentifier "z") (EIdentifier "n"))
    (EGrouped [ EIdentifier "n" , ESymbol Ord "!" ])
]