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.

[EX Q]: Willy has 1400 crayons . Lucy has 290 crayons . How many more crayons does Willy have then Lucy ?
[EX A]: 1110

[EX Q]: A farmer estimates that he will harvest 48097 bushels of wheat . The weather is perfect during the growing season , so he harvests 684 more bushels of wheat than expected . How many bushels of wheat does the farmer harvest ?
[EX A]: 48781

[EX Q]: Joan has 47 green and 48 red marbles . Fred took 24 of Joan 's green marbles . How many green marbles does Joan now have ?
[EX A]:
23