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.

Input: Consider Input: There are 40 boys and some girls on the playground . There are 117 children altogether . How many girls are on the playground ?

Output: 77

Input: Consider Input: Robin uploaded 31 pictures from her phone and 5 from her camera to facebook . If she sorted the pics into 9 different albums with the same amount of pics in each album , how many pictures were in each of the albums ?

Output: 4

Input: Consider Input: Kristi jogged for 0.6 of an hour , swam for 0.5 of an hour , and rode her bicycle for 0.75 of an hour . How long did she exercise ?
Output: 1.85