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.

[EX Q]: Recently , the value of Kate 's retirement fund decreased by $ 12 . If her fund was worth $ 1472 before , how much is it worth now ?
[EX A]: 1460

[EX Q]: Last year , 90171 people were born in a country , and 16320 people immigrated to it . How many new people began living in the country last year ?
[EX A]: 106491

[EX Q]: Josh had 16 marbles in his collection . He lost 7 marbles . How many marbles does he have now ?
[EX A]:
9