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: Fred loves trading cards . He bought 2 packs of football cards for $ 2.73 each , a pack of Pokemon cards for $ 4.01 , and a deck of baseball cards for $ 8.95 . How much did Fred spend on cards ?

SOLUTION: 18.42

PROBLEM: While playing a video game , Paul scored 3103 points . He and his cousin together have a total of 5816 points . How many points does Paul 's cousin have ?

SOLUTION: 2713

PROBLEM: Carla has some marbles . She bought 489 marbles . Now she has 2778 marbles all together . How many did she start with ?

SOLUTION:
2289