TASK DEFINITION: You are given a math word problem and you are supposed to apply an addition mathematical operator on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
PROBLEM: Context: Edward spent $ 4 to buy books and $ 3 to buy pens. Now he has $ 12. 

 Question: How much did Edward spend on books and pens?

SOLUTION: 7

PROBLEM: Context: In a school there are 308 girls and 318 boys. There are also 36 teachers 

 Question: How many pupils are there in that school?

SOLUTION: 626

PROBLEM: Context: Robin's hair was 14 inches long. It grew by 8 inches. Then he cut off 20 inches. 

 Question: How long is his hair now?

SOLUTION:
2