In math terms, when we think of the words "Taken away", we immediately think of subtraction/subtracting. So, the symbol that you're looking for looks sort of like a dash.
- is what it looks like.
Hope this helps!
Message me if you need anything else! I'd be happy to help you! :D
The symbol you are looking for is called the Subtracting sign. Here is what it looks like in an attachment. Here are words for what it is called: Subtract Minus
