Convert IP address to Country Name
Example:
Translate IP address to country for each visiting records

Replace settings:
1) Replace unit=Chars
2) Search for pattern=\d+\.\d+\.\d+\.\d+
3) Replace with pattern=$match \( ip2country($match) \)
4) Note: you can also select menu Replace->Replace by template->Misc->Convert IP to Country Name
Expression Calculator
Example:
Calculate result of each line

Replace settings:
1) Replace unit=Line
2) Search for pattern=.*
3) Replace with pattern=$match = eval($match)\n
4) If=$match=~/^[\d\+\-\*\/\(\)\.\s]+$/
5) Note: you can also select menu Replace->Replace by template->Misc->Expression Calculator