Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

Example Input: finally they had to roam around 169 factories to make sure they are throwing their wastes properly . if their group went to 69 factories and the second went to 52 how many factories remain unchecked ?
Example Output: 48

Example Input: next on his shopping list are the eggs . if he needs 222 eggs for his cake and his friend andrew gave him 155 how many more eggs should he buy ?
Example Output: 67

Example Input: jose has 28 chickens and 18 ducks . how many fowls does he have ?
Example Output:
46