[ EGrouped
    [ EIdentifier "A"
    , EPhantom (EIdentifier "A")
    , EIdentifier "A"
    , EGrouped
        [ EPhantom
            (EGrouped [ EIdentifier "A" , ESymbol Bin "+" , EIdentifier "A" ])
        , EIdentifier "A"
        ]
    ]
, EIdentifier "A"
, EIdentifier "A"
, EIdentifier "A"
, EGrouped
    [ EIdentifier "A"
    , ESymbol Bin "+"
    , EIdentifier "A"
    , EIdentifier "A"
    ]
]