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: Omar and Karen made egg rolls to share at the school potluck . Omar rolled 219 egg rolls . Karen rolled 229 egg rolls . What is the total number of egg rolls Omar and Karen rolled ?

A: 448
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Q: Tim had 7 quarters and 9 nickels in his bank . His dad gave him 3 nickels and 5 pennies . How many nickels does Tim have now ?

A: 12
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Q: There are 4 walnut trees currently in the park . Park workers will plant 6 walnut trees today . How many walnut trees will the park have when the workers are finished ?

A:
10
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