Search&Replace certain string text, and replace/remove it
- 
ABCa: 12
ABCd, 35and replace it with
ABC
 - 
FIND WHAT =
ABC.*
REPLACE WITH =ABC
SEARCH MODE = Regular Expression
uncheck “dot matches newline”----
Useful References
 - 
 - 
FIND WHAT =
ABC.*DEFGH
REPLACE WITH =ABCDEFGH
SEARCH MODE = Regular Expression
uncheck “dot matches newline”… and you really need to read and understand at least the Template for Search/Replace Questions from my list of useful references.