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]: Gwen was organizing her book case making sure each of the shelves had exactly 4 books on it . If she had 5 shelves of mystery books and 3 shelves of picture books , how many books did she have total ?
[EX A]: 32

[EX Q]: There are 139 erasers and 118 scissors in the drawer . Jason placed 131 erasers in the drawer . How many erasers are now there in total ?
[EX A]: 270

[EX Q]: Some insects called aphids attack a large farm . In response , the farmer releases ladybugs onto the fields . There are 12170 ladybugs with spots and 54912 ladybugs without spots . How many ladybugs are there in all ?
[EX A]:
67082