instruction:
You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
question:
A book store had 4 books in the bargin bin . If they sold 3 books , but then put 10 more in the bin , how many books would be in the bin ?
answer:
11


question:
A car company produced 3884 cars in North America and 2871 cars in Europe . How many cars is that in all ?
answer:
6755


question:
Sally had 8 pennies and 7 nickels in her bank . Her dad gave her 9 nickels and her mother gave her 2 nickels . How many nickels does Sally have now ?
answer:

18