Given the task definition, example input & output, solve the new input case.
You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
Example: Last year , 90171 people were born in a country , and 16320 people immigrated to it . How many new people began living in the country last year ?
Output: 106491
Total people living in the country = born - immigrated = 90171 - 16320 = 106491

New input case for you: A farmer estimates that he will harvest 48097 bushels of wheat . The weather is perfect during the growing season , so he harvests 684 bushels of wheat than expected . How many bushels of wheat does the farmer harvest ?
Output:
48781