Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

Input: Consider Input: will was drawing super heroes on a sheet of scrap paper . he drew 2 heroes on the front and 7 heroes on the back . how many heroes did he draw total ?

Output: 9

Input: Consider Input: mike owned 64 baseball cards . for his birthday he got 18 more . how many cards does mike have total ?

Output: 82

Input: Consider Input: a tape was 13 meters long . haley used some to seal cartons . now the tape is 6 meters long . how much tape did she use ?
Output: 7