instruction:
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.
question:
Context: Jessie weighed 92 kilograms. After she started to go jogging everyday she lost 56 kilograms in the first week and 99 kilograms in the second week.

Question: How much did she weigh after the first week of jogging?
answer:
36

question:
Context: Edward spent $ 16 to buy books and $ 8 to buy pens. Now he has $ 19.

Question: How much more did Edward spend on books than pens?
answer:
8

question:
Context: Every day Ryan spends 7 hours on learning english, 2 hours on learning chinese and 4 hours on learning spanish.

Question: How many more hours does he spend on learning english than he does on learning spanish?
answer:
3