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: Baker made 149 cakes and 91 pastries. If he sold 10 cakes and 90 pastries 

 Question: How many cakes would baker still have?

A: 139
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Q: Context: 5 children were riding on the bus. At the bus stop 63 children got off the bus while some more got on the bus. Then there were 14 children altogether on the bus. 

 Question: How many more children got on the bus than those that got off?

A: 9
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Q: Context: Mary is baking a cake. The recipe calls for 9 cups of flour and 6 cups of sugar. She already put in 4 cups of sugar. 

 Question: How many more cups of flour than cups of sugar does she need to add now?

A:
7
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