[ EFraction
    NormalFrac
    (EIdentifier "x")
    (EFraction NormalFrac (EIdentifier "y") (ENumber "2"))
, ESymbol Rel "="
, EFraction
    NormalFrac
    (EIdentifier "x")
    (EFraction NormalFrac (EIdentifier "y") (ENumber "2"))
, ESymbol Rel "="
, EFraction
    NormalFrac
    (EIdentifier "x")
    (EFraction NormalFrac (EIdentifier "y") (ENumber "2"))
]