You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.

[Q]: Carlos has 58 blocks . He gives 21 to Rachel . How many blocks will Carlos have ?
[A]: 37


[Q]: Dan has 5 blue marbles . Mary has 2 times more blue marbles than Dan . How many blue marbles does Mary have ?
[A]: 10


[Q]: Norma starts with 47 bananas . She loses 45 . How many bananas does Norma end with ?
[A]:
2