#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "(?m)^(?<!\) end).*?\(([\x00-\x27\x2A-\x7F]+?)\) end"
Local $sString = "There are some other sentences before (some otherwords which I am not interested in) all these.This is a sample string (something which I am interested in) end. This is another repeated string (with some otherwords) end."
Local $sSubst = ""
Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst)
MsgBox($MB_SYSTEMMODAL, "Result", $sResult)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm