<<< native [ ENumber "5" , ESymbol Bin "+" , ENumber "5" , ESymbol Bin "+" , ENumber "1" , ESymbol Bin "+" , ENumber "1" , ESymbol Bin "+" , ENumber "5" , ESymbol Bin "+" , ENumber "3" , ESymbol Bin "+" , ENumber "9" ] >>> eqn 5 + 5 + 1 + 1 + 5 + 3 + 9