<<< native [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" , ESymbol Bin "+" , EIdentifier "c" , ESymbol Bin "+" , EIdentifier "f" , ESymbol Bin "+" , EIdentifier "\915" , ESymbol Bin "+" , EIdentifier "d" ] >>> eqn a + b + c + f + GAMMA + d