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.

Example Input: A store had 5 oranges in a bin . If they threw away 2 of the old ones and put 28 new ones in the bin how many would be in the bin ?
Example Output: 31

Example Input: A worksheet had 2 problems on it . If a teacher had 14 worksheets to grade and had already graded 7 of them , how many more problems does she have to grade ?
Example Output: 14

Example Input: Debby had 30 coloring books . If she gave away 7 of them , but then bought 35 more , how many would she have total ?
Example Output:
58