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.

sarah bought 8 new shirts for school . if she already had 9 shirts how many did she own total ?
17

after the framework was finished they asked 239 monkeys and 622 termites to finish the rest of the building . how many workers finished the rest of the construction ?
861

greg wants to buy a $ 90 scooter . he has saved $ 57 so far . how much more money does greg need ?
33