int4.test

<<< 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"
]
>>> tex
\int_{0}^{1}f\left( \frac{x}{2} \right)\mspace{2mu}\mathbb{d}x