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.
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Question: Jessica is baking a cake . The recipe calls for 8 cups of flour and 2 cups of sugar . She already put in 4 cups of flour . How many cups of flour does she need to add ?

Answer: 4


Question: Misha has 34 dollars . How many dollars does she have to earn to have 47 dollars to buy a dog ?

Answer: 13


Question: Alyssa 's cat had 8 kittens and 8 had spots . She gave 4 to her friends . How many kittens does she now have ?

Answer:
4