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: For Halloween Emily received 5 pieces of candy from neighbors and 13 pieces from her older sister . If she only ate 9 pieces a day , how long would the candy last her ?
Example Output: 2

Example Input: A carpenter bought a piece of wood that was 0.41 meters long . Then she sawed 0.33 meters off the end . How long is the piece of wood now ?
Example Output: 0.08

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