[ESuper (EIdentifier "x") (ENumber "1"),ESymbol Bin "+",ESuper (EIdentifier "x") (EIdentifier "a"),ESymbol Bin "+",ESuper (EIdentifier "H") (EIdentifier "a"),ESymbol Bin "+",ESuper (EIdentifier "H") (ENumber "1"),ESymbol Bin "+",ESubsup (EIdentifier "x") (ENumber "1") (ENumber "2"),ESymbol Bin "+",ESubsup (EIdentifier "x") (EIdentifier "a") (ENumber "2"),ESymbol Bin "+",ESubsup (EIdentifier "x") (ENumber "1") (EIdentifier "x"),ESymbol Bin "+",ESubsup (EIdentifier "x") (EIdentifier "a") (EIdentifier "x"),ESymbol Bin "+",ESubsup (EIdentifier "H") (ENumber "1") (ENumber "2"),ESymbol Bin "+",ESubsup (EIdentifier "H") (EIdentifier "a") (ENumber "2"),ESymbol Bin "+",ESubsup (EIdentifier "H") (ENumber "1") (EIdentifier "x"),ESymbol Bin "+",ESubsup (EIdentifier "H") (EIdentifier "a") (EIdentifier "x")]