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: molly had 14 candles on her birthday cake . she grew older and got 6 more on her birthday cake . how old is molly now ?
Example Output: 20

Example Input: zoe was unboxing some of her old winter clothes . she found 8 boxes of clothing and inside each box there were 4 scarves and 6 mittens . how many pieces of winter clothing did zoe have total ?
Example Output: 80

Example Input: the map led them through the forest and into a cave . to open the cave doors they need to put weights on the switch . if the switch already has 234 lbs . of weights and the total needed is 712 lbs . how much more weight to they need to add ?
Example Output:
478