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

Q: A pet store had 36 siamese cats and 18 house cats . During a sale they sold 26 cats . How many cats do they have left ?

A: 28
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Q: Mary has 9 yellow marbles Joan has 3 yellow marbles . How many yellow marbles do they have in all ?

A: 12
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Q: Jane starts with 87 crayons . 7 are eaten by a hippopotamus . How many crayons does Jane end with ?

A:
80
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