instruction:
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.
question:
Melanie grew 139 turnips . Benny grew 113 turnips . How many turnips did they grow in all ?
answer:
252


question:
Melanie picked 4 plums , Dan picked 9 plums , and Sally picked 3 plums from the plum tree . How many plums were picked in total ?
answer:
16


question:
Karen has 639 crayons . Cindy has 504 crayons . How many more crayons does Karen have than Cindy ?
answer:

135