#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox
Local $sRegex = "[A-Za-z0-9 ']*(?:(?:~~|&&)[A-Za-z0-9 ']*)*\K(?:[^A-Za-z0-9 ']|\z)"
Local $sString = "I like~~cake~too&&m~~~~u~~~~~ch&now.~~~gh" & @CRLF & _
"" & @CRLF & _
"a~&a"
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