instruction:
You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
question:
lena had some pocket money . she lost $ 4 and her mom gave her $ 9 . if she had $ 66 after that how many dollars did lena have at first ?
answer:
61

question:
an online toy store stocked some toys . it sold 38 toys at the first week and 26 toys at the second week . if it had 19 toys left how many toys were in stock at the beginning ?
answer:
83

question:
sam invited 9 friends to a birthday party but 6 could n't come . if he wanted to buy enough cupcakes so each person could have exactly 2 how many should he buy ?
answer:
6