TASK DEFINITION: You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
PROBLEM: There are 69 erasers in a box . Jane has 15 erasers in a bag . Doris takes 54 erasers out of the box . How many erasers are left in the box ?

SOLUTION: 15

PROBLEM: Sean has 55 blocks . 29 are eaten by a hippopotamus . How many blocks will Sean have ?

SOLUTION: 26

PROBLEM: Adam has $ 5 to buy an airplane that costs $ 4.28 . How much change will he get ?

SOLUTION:
0.72