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: 2172 sottrazione 9710 sottrazione 6694 aggiunta 3179 sottrazione 300 aggiunta 1349 sottrazione 9231 aggiunta 5377

Solution: -13858