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.

[EX Q]: there are some rooms in a building . 35 of them are classrooms 10 of them are office and the remaining 6 are reading rooms . how many rooms are in the building ?
[EX A]: 51

[EX Q]: haley 's old washing machine could only wash 7 pieces of clothing at a time . if she had to wash 2 shirts and 33 sweaters how many loads would she have to do ?
[EX A]: 5

[EX Q]: the third graders are having a fair . they have 90 tickets to sell . they sold 38 tickets the first week and 17 tickets the second week . how many tickets do they have left to sell ?
[EX A]:
35