You are given a math word problem and you are supposed to apply an addition mathematical operator 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: Context: Edward spent $ 4 to buy books and $ 3 to buy pens. Now he has $ 12.

Question: How much did Edward spend on books and pens?

Answer: 7

Question: Context: Julia played tag with 15 kids on monday, 18 kids on tuesday and 97 kids on wednesday.

Question: How many kids did she play with on monday and tuesday?

Answer: 33

Question: Context: Mary is baking a cake. The recipe calls for 6 cups of flour and 13 cups of sugar. She already put in some cups of flour. If she still needs 8 more cups of flour than sugar

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

Answer:
21