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'.
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Question: 157 sottrazione 9421 aggiunta 4925

Answer: -4339


Question: 6639 sottrazione 5121 aggiunta 205 aggiunta 2175 aggiunta 4534 sottrazione 1535

Answer: 6897


Question: 6145 aggiunta 3960 aggiunta 4208 sottrazione 4629

Answer:
9684