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: Joan has 47 green and 48 red marbles . Fred took 24 of Joan 's green marbles . How many green marbles does Joan now have ?

SOLUTION: 23

PROBLEM: While shopping for music online , Isabel bought 6 country albums and 2 pop albums . Each album came with a lyric sheet and had 9 songs . How many songs did Isabel buy total ?

SOLUTION: 72

PROBLEM: Marilyn starts with 51 bottle caps . She shares 36 with Nancy . How many bottle caps does Marilyn end with ?

SOLUTION:
15