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:
For homework Nancy had 17 math problems and 15 spelling problems . If she can finish 8 problems in an hour how long will it take her to finish all the problems ?

Ex Output:
4


Ex Input:
The selling price of a pair of pants is 34 dollars . If the store paid 8 dollars less for the pants , find the price that the store paid , in dollars .

Ex Output:
26


Ex Input:
Dana earns $ 13 per hour . She worked 9 hours on Friday , 10 hours on Saturday , and 3 hours on Sunday . How much money did Dana earn in all ?

Ex Output:

286