Hi, just wondering how i can duplicate a string and manipulate it. What i'd like to be able to do is take a string like 1934 + 44, duplicate it and then change the plus sign to a minus.

Whats the best way of performing a task like this, can it be used to change multiple + signs within the same string?

Many Thanks
Ben

ps. Sorry if this has been posted before, Im not too sure what I would search for this