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.

While on vacation , Haley took 50 pictures at the zoo and 8 at the museum . If she later deleted 38 of the pictures , how many pictures from her vacation did she still have ?
20

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 ?
32

The cafeteria had 75 apples . For lunch they handed out 19 to students and decided to use the rest to make pies . If each pie takes 8 apples , how many pies could they make ?

7