msubsup-03.native

[ESubsup (EIdentifier "L") (EIdentifier "x") (ENumber "2"),ESymbol Rel "=",ESubsup (EIdentifier "L") (ESub (EIdentifier "x") (EPhantom (EIdentifier "z"))) (ESuper (ENumber "2") (EPhantom (EIdentifier "z")))]