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: mike and his brother joe found a map leading to a buried treasure in an unknown island so they decided to go on a treasure hunt . after decoding the clues on the map they found out that they need to go to the island of mysteries . to get there they could either take a plane for $ 600 or a boat for $ 254 . how much money can they save if they took a boat to the island ?
Example Output: 346

Example Input: the wings now need to be heated . if the oven is at 150 degrees and the required temperature is 546 degrees how many more degrees does the oven temperature need to increase ?
Example Output: 396

Example Input: the litter patrol picked up 10 glass bottles and 8 aluminum cans on saturday . how many pieces of litter did they pick up altogether ?
Example Output:
18