<<< native [ EBoxed (EGrouped [ ESuper (EIdentifier "x") (ENumber "2") , ESymbol Bin "+" , ESuper (EIdentifier "y") (ENumber "2") , ESymbol Bin "+" , ESuper (EIdentifier "z") (ENumber "2") ]) ] >>> eqn {x sup 2 + y sup 2 + z sup 2}