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]: Mary had 7 nickels in her bank . Her dad gave her 5 nickels . How many nickels does Mary have now ?
[A]: 12


[Q]: Mary had 21 dimes and 38 pennies in her bank . Her dad borrowed 18 pennies from Mary . How many pennies does she have now ?
[A]: 20


[Q]: There are 2 rose bushes currently in the park . Park workers will plant 4 more rose bushes today . How many rose bushes will the park have when the workers are finished ?
[A]:
6