<<< native [ ENumber "2" , ESymbol Bin "+" , ESqrt (EGrouped [ EIdentifier "x" , ESymbol Bin "+" , ENumber "1" ]) , ESpace (0 % 1) , EGrouped [ ENumber "2" , ESymbol Bin "+" , ESqrt (EGrouped [ EIdentifier "x" , ESymbol Bin "+" , ENumber "1" ]) ] ] >>> eqn 2 + sqrt {x + 1} fwd 0 {2 + sqrt {x + 1}}