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.

Ex Input:
Nell collects baseball cards . She had 304 cards . She gave some of her cards to Jeff and now has 276 cards left . How many cards did Nell give to Jeff ?

Ex Output:
28


Ex Input:
For his car , Mike spent $ 118.54 on speakers and $ 106.33 on new tires . Mike wanted 3 CD 's for $ 4.58 but decided not to . In total , how much did Mike spend on car parts ?

Ex Output:
224.87


Ex Input:
Darnel sprinted 0.875 lap and then took a break by jogging 0.75 lap . How much farther did Darnel sprint than jog ?

Ex Output:

0.125