Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.
One example is below.
Q: robin bought 11 sodas for her and her friends . if they only drank 3 of them how many extras did she have ?
A: 8
Rationale: Extra sodas is total - drank = 11-3 = 8
Q: gwen prepared 98 books to sell in the flea market . after the activity ended she had 96 books left . how many did she sell ?
A:
2