I'm 90% of the way on this one, after reading the forums here, but I'm stuck on one last piece.  

I'm scanning a document in via Quickfields.  These are report cards, and depending on the Grade of the student I want to calculate the year they should graduate.  I've got the grade as a token, and I've combined the grade and -12 in a multi token so I can use "Sum" to figure out how many years are left.  But - because (Grade - 12) is negative, when I combine with the current year, the answer is in the past.  

I've tried adding -1* before the token to get it to change from negative to positive when I assign the value to the token, but that just seems to turn it into text and it does not calculate.  

As per the screenshot below, using Sum is sort of working.  Is there some way to use operators on Tokens?

Alternatively, given that the potential number of years is limited, I could do a series of conditionals to create a token.  But I'm lazy, and this seems easier.