[ESubsup (EIdentifier "X") (ESubsup (EIdentifier "Z") (ENumber "4") (ENumber "3")) (ESubsup (EIdentifier "Y") (ENumber "2") (ENumber "1")),ESymbol Rel "=",ESubsup (EIdentifier "X") (ESubsup (EIdentifier "Z") (ENumber "4") (ENumber "3")) (ESubsup (EIdentifier "Y") (ENumber "2") (ENumber "1"))]