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.

Example Input: In March it rained 0.81 inches . It rained 0.35 inches less in April than in March . How much did it rain in April ?
Example Output: 0.46

Example Input: Students at Arcadia schools are participating in a coat drive . 9437 coats have been collected so far . 6922 coats were collected from the high schools , and the rest from the elementary schools . How many coats were collected at the elementary schools ?
Example Output: 2515

Example Input: There are 9 crayons in the drawer . Benny placed 3 crayons in the drawer . How many crayons are now there in total ?
Example Output:
12