Newbie Question > Remove different digit sequences between two always same characters

I hope you can help me. I am looking for a way to remove different sequences of digits with 7 digits each from files. The digits to be removed are always completely different and each have an always identical character before (-) and after ( _), so for example like this:

-1234567 _
-2345678 _
-3456789 _
-1538264 _

I want to remove these parts of the file names completely. Can someone please tell me how to do this? Unfortunately I have no idea about Reg Expressions :-(

Thanks!

Kim has supplied a User Guide for a reason!
See https://www.advancedrenamer.com/user_guide/regul ar_expresions

Remove pattern: -\d{7} _
Use regular expressions

Reply to #2:
Since I had understood also with the guidance nothing, I am very grateful to you, for that great working solution ;-)