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: 4779 sottrazione 87 sottrazione 9521 sottrazione 5371 aggiunta 2597 aggiunta 3812 aggiunta 5742 aggiunta 9975 sottrazione 8200

Solution: 3726