instruction:
You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
question:
there are 100 books on a shelf . 32 of them are history books 25 of them are geography books and the rest are math books . how many math books are there on the shelf ?
answer:
43

question:
evan has a large collection of books . he gave his best friend 14 books . he gave his little brother 8 books . now evan has 60 books in his collection . how many books did he have at first ?
answer:
82

question:
a new building needed 14 windows . the builder had already installed 5 of them . if it takes 4 hours to install each window how long will it take him to install the rest ?
answer:
36