i want to get the result of "echo $?" but got [?2004h

It seems like you have accidentally entered some special characters in your command line. The "[?2004h" part is likely a terminal control sequence that got mixed up with your command.

To fix this, you can try running the command again and make sure to only enter the necessary characters. Alternatively, you can try clearing the terminal screen by pressing "Ctrl + L" and then running the command again.

Once you have run the command successfully, you should be able to get the result of "echo $?" by simply typing "echo $?" in the terminal.