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