You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Q: Context: A farmer had 105 green tomatoes and 71 red tomatoes in his garden. If he picked 137 tomatoes 

 Question: How many tomatoes are left?

A: 39
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Q: Context: Jerry had 7 action figures on a shelf in his room. Later he added some more action figures to the shelf and removed 10 of the old ones. If there are 8 action figures on his shelf now 

 Question: How many action figures did he add to the shelf?

A: 11
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Q: Context: David did 36 more push-ups but 33 less crunches than Zachary in gym class today. If Zachary did 58 push-ups and 33 crunches 

 Question: How many more push-ups than crunches did Zachary do?

A:
25
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