public String toString(){
		StringBuffer buffer = new StringBuffer();
		buffer.append(getOperatorPrototype());
		buffer.append("(");
		
		for (int i = 0 ; i < getArgumentCount() ; i ++){
			if (i != 0){
				buffer.append(",");
			}
			buffer.append(getArgument(i).toString());
		}
		
		buffer.append(")");
		return buffer.toString();
	}