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: A farmer had 171 tomatoes in his garden. If he picked 134 of them yesterday and 30 today. 

 Question: How many will he have left after today?
answer:
7


question:
Context: Ed had 2 more marbles than Doug. Doug lost some of his marbles at the playground. Now Ed has 19 more marbles than doug. 

 Question: How many marbles did Doug lose?
answer:
17


question:
Context: Because of the decision Sofia asked the students to suggest specific types of food. If 408 students suggested adding mashed potatoes while 42 suggested adding bacon to the menu 

 Question: How many more students suggested mashed potatoes than those that suggested bacon?
answer:

366