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]: Carol and her mom were picking carrots from their garden . Carol picked 29 and her mother picked 16 . If only 38 of the carrots were good , how many bad carrots did they have ?
[EX A]: 7

[EX Q]: Joan found 70 seashells on the beach . she gave Sam some of her seashells . She has 27 seashell . How many seashells did she give to Sam ?
[EX A]: 43

[EX Q]: Mariela was in the hospital and she got 403 get well cards from around the country . When she got home she got 287 more cards from friends and family . How many get well cards did Mariela get ?
[EX A]:
690