Help in commands

How can I make it so that I write the command, say !tlt GTA stream, the title of the stream changes to “GTA stream | !discord”. That is, there was a fixed part of the title whenever I changed the title stream. And another question, how to delete a command when I entered !addcom in the chat?

problem fix:
!addcom !tlt -a=!title -ul=moderator $(query) | !discord

You can delete commands using !commands delete [Command Name] or via the dashboard in the commands setting.