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: 9544 aggiunta 362 aggiunta 1971 sottrazione 7679 aggiunta 9061 sottrazione 806 sottrazione 8706 sottrazione 8290 aggiunta 1923

Solution: -2620