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:
At Oliver 's Restaurant a group with 2 adults and 4 children came in to eat . If each meal cost 3 dollars , how much was the bill ?

Ex Output:
18

Ex Input:
You have collected 7 crickets . How many more crickets do you need to collect to have 11 crickets ?

Ex Output:
4

Ex Input:
In fourth grade there were 4 students at the start of the year . During the year 3 students left and 42 new students came to school . How many students were in fourth grade at the end ?

Ex Output:
43