TASK DEFINITION: You are given a math word problem and you are supposed to apply a single mathematical operator 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.
PROBLEM: a museum had 14 paintings . after they got rid of some they had 4 left . what 's the difference between the number of paintings before they got rid of and the left ?

SOLUTION: 10

PROBLEM: olivia was buying dvds of her favorite tv series . each season had 8 dvds . if she bought 5 seasons how many dvds did she buy total ?

SOLUTION: 40

PROBLEM: zoe 's school sold 620 dollars in raffle tickets . if each ticket cost 4 dollars how many tickets did they sell ?

SOLUTION:
155