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

Heather weighs 87 pounds . Emily weighs 9 pounds . Elizabeth weighs 8 pounds . How much heavier is Heather than Emily ?
78

There are 6 pencils and 7 rulers in the drawer . Benny placed 3 pencils in the drawer . How many pencils are now there in total ?
9

There are 34 dogwood trees currently in the park . Park workers will plant 49 more dogwood trees today . How many dogwood trees will the park have when the workers are finished ?

83