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.

Amy had 26 music files and 36 video files on her flash drive . If she deleted 48 of the files , how many files were still on her flash drive ?
14

Gary had 73 dollars . He spent 55 dollars on a pet snake . How many dollars did Gary have left ?
18

Sara has 3 green and 5 red marbles . Tom has 4 green marbles . How many green marbles do they have in total ?

7