<<< native [ EUnder False (EIdentifier "BASE") (EIdentifier "x") , ESymbol Rel "=" , EUnder False (EIdentifier "BASE") (EGrouped [ EPhantom (ENumber "1") , EIdentifier "x" , EPhantom (ENumber "1") ]) ] >>> eqn BASE from x = BASE from {hphantom 1 x hphantom 1}