Yes.

Add command: !addcom <command> [-ul=mod] <text>
example: !addcom !test test here with mod
example2 !addcom !testmod -ul=mod test here with moderation

Del command: !delcom <command>
example: !delcom !test

Edit command: !editcom <command> [-ul=mod] <text>
example: !editcom !test test here with mod
example2 !editcom !testmod -ul=mod test here with moderation