In this task you will be given an arithmetic operation in Italian and you have to find its answer. The operations 'addition' and 'subtraction' have been replaced with their italian translations i.e you need to perform addition when you see 'aggiunta' and subtraction in case of 'sottrazione'.
Example: 10 sottrazione 7
Example solution: 3
Example explanation: Here, 'sottrazione' represents the subtraction operation. So, the answer is 3 (10-7=3).

Problem: 8257 aggiunta 5624 sottrazione 7417 sottrazione 5100 aggiunta 6518 sottrazione 2293 aggiunta 2129 aggiunta 2967

Solution: 10685