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: A restaurant served 4 pies during lunch and 9 during dinner today . The restaurant served 7 pies and 2 pizzas yesterday . How many pies were served in total ?
Example Output: 20

Example Input: In fourth grade there were 10 students at the start of the year . During the year 4 students left and 42 new students came to school . How many students were in fourth grade at the end ?
Example Output: 48

Example Input: Omar and Karen made egg rolls to share at the school potluck . Omar rolled 219 egg rolls . Karen rolled 229 egg rolls . What is the total number of egg rolls Omar and Karen rolled ?
Example Output:
448