TASK DEFINITION: You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.
PROBLEM: Paul got a box of 479 crayons for his birthday . At the end of the school year , he only had 134 left . How many crayons had been lost or given away ?

SOLUTION: 345

PROBLEM: Omar and Karen made egg rolls to share at the school potluck . Omar rolled 219 egg rolls . Karen rolled 229 egg rolls . What is the total number of egg rolls Omar and Karen rolled ?

SOLUTION: 448

PROBLEM: Anne weighs 67 pounds . Douglas weighs 52 pounds . How much heavier is Anne than Douglas ?

SOLUTION:
15