<<< native [ EIdentifier "x" , ESymbol Bin "+" , EIdentifier "x" , ESymbol Bin "+" , EIdentifier "x" , ESymbol Bin "+" , EIdentifier "x" , ESymbol Bin "+" , EIdentifier "x" , ESymbol Bin "+" , EIdentifier "x" ] >>> eqn x + x + x + x + x + x