Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

Ex Input:
there were 51 geese in the farmer 's field . 28 of the geese flew away . how many geese were left in the field ?

Ex Output:
23

Ex Input:
emily was playing a trivia game . in the first round she scored 16 points and in the second round she scored 33 points . in the last round she lost 48 points . how many points did she have at the end of the game ?

Ex Output:
1

Ex Input:
it takes mike 98 minutes to walk to school . if he rides a bicycle to school it would save him 64 minutes . how much time did mike save ?

Ex Output:
34