Simple arithmetic

[Praveen]

What is the simplest way to add 5 to a number at the end of a line? 

Example:

Start:

.NFLX250117C835-.NFLX250117C835

End:

.NFLX250117C835-.NFLX250117C840

As you can see above, the 835 at the end of the line is changed to 840.

I'm using TextSoap 9.5 Direct Edition on macOS 15.2

Thanks for your help!