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.

[EX Q]: There are 2 bananas in a pile on the desk . Each banana comes in a package of 13 . 7 bananas are added to the pile . How many bananas are there in the pile ?
[EX A]: 9

[EX Q]: You have collected 7 crickets . How many more crickets do you need to collect to have 11 crickets ?
[EX A]: 4

[EX Q]: Joan has 40 blue balloons Melanie has 41 blue balloons . How many blue balloons do they have in total ?
[EX A]:
81