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.
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Question: Context: Marco and his dad went strawberry picking. Together their strawberries weighed 4 pounds. Marco's strawberries weighed 19 pounds. 

 Question: How much more did his strawberries weigh than his dad's?

Answer: 34


Question: Context: Paul got a box of 110 crayons for his birthday. During the school year he gave 90 crayons to his friends while he lost 412 crayons. 

 Question: How many more crayons did he lose than those he gave to his friends?

Answer: 322


Question: Context: Paul got a box of 531 crayons and 38 erasers for his birthday. At the end of the school year he only had 391 left while not having lost a single erasers. 

 Question: How many more crayons than erasers did he have left?

Answer:
353