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.

Ex Input:
Faye and her mom were picking carrots from their garden . Faye picked 23 and her mother picked 5 . If only 12 of the carrots were good , how many bad carrots did they have ?

Ex Output:
16


Ex Input:
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 ?

Ex Output:
15


Ex Input:
Oliver had 35 dollars . For his birthday he got 50 more dollars but spent 84 on a new game . How much money does he have now ?

Ex Output:

1