Given the task definition, example input & output, solve the new input case.
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: For the school bake sale Bianca made 14 cupcakes . If she sold 6 of them and then made 17 more , how many cupcakes would she have ?
Output: 25
Total cupcakes she would have = baked - sold = 14 -6 + 17 = 25 

New input case for you: On 3 consecutive passes , a football team gains 9 yards , loses 21 yards , and gains 37 yards . What number represents the total net yardage ?
Output:
25