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.
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Question: Haley was playing a video game and had 14 lives . In a hard part of the game she lost 4 lives . If she got 36 more lives in the next level , how many lives would she have ?

Answer: 46

Question: 231 birds were sitting in a tree . Some more fly up to the tree . Then there were 312 birds in the tree . How many more fly up to the tree ?

Answer: 81

Question: Jason grew 23 watermelons and 18 turnips . Nancy grew 28 watermelons . How many watermelons did they grow in total ?

Answer:
51