Instructions: 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.
Input: the wolves though accustomed to cold weather also wanted to move away from the incoming winter . if there are 43 packs of wolves living in the forest and 31 packs went away how many wolf packs were left in the forest ?
Output:
12