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.

[Q]: amy had some candy . she gave her friend 6 pieces and had 5 left . what 's the difference between of the pieces of candy amy gave away and the left ?
[A]: 1

[Q]: paul bought 6 boxes of chocolate candy and 4 boxes of caramel candy . if each box has 9 pieces inside it how much candy did he have total ?
[A]: 90

[Q]: kevin and his family just moved to a new neighborhood so they are holding a party to be able to meet their new neighbors . for the party they prepared a few snacks for everyone . if his sister prepared 25 mini cupcakes and his mother prepared 30 how many did his grandmother prepare if they have a total of 100 cupcakes ?
[A]:
45