int4.native

[ ESubsup (ESymbol Op "\8747") (ENumber "0") (ENumber "1")
, EIdentifier "f"
, EDelimited
    "("
    ")"
    [ Right (EFraction NormalFrac (EIdentifier "x") (ENumber "2")) ]
, ESpace (1 % 9)
, ESymbol Ord "\8518"
, EIdentifier "x"
]