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.

Luke was organizing his baseball cards in a binder with 3 on each page . If he had 3 new cards and 9 old cards to put in the binder , how many pages would he use ?
4

Henry had 11 dollars . For his birthday he got 18 more dollars but spent 10 on a new game . How much money does he have now ?
19

Chloe picked 48 carrots from her garden . If she threw out 45 of them and then picked 42 more the next day , how many carrots would she have total ?

45