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

[Q]: A pet store has 6 bird cages . If each cage has 6 parrots and 2 parakeets in it , how many birds does the pet store have total ?
[A]: 48

[Q]: In fourth grade there were 4 students at the start of the year . During the year 3 students left and 42 new students came to school . How many students were in fourth grade at the end ?
[A]: 43

[Q]: Roger had 29 dollars . For his birthday he got 20 more dollars but spent 34 on a new game . How much money does he have now ?
[A]:
15