You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example Input: Context: In a school there are 868 girls and the rest are boys. If there are 281 more girls than boys 

 Question: How many pupils are there in that school?
Example Output: 1455

Example Input: Context: Dan has $ 7. He bought a candy bar for $ 2 and a chocolate for $ 3. 

 Question: How much money is left?
Example Output: 2

Example Input: Context: For Gwen's birthday she received 2 dollars from her mom. Her dad gave her 4 more dollars. If she spent 3 dollars. 

 Question: How much money did she still have?
Example Output:
3