[ ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper
    (EGrouped [ EIdentifier "M" , EIdentifier "x" ]) (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
, ESymbol Bin "+"
, ESuper (EIdentifier "x") (ENumber "2")
]