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.

[Q]: peter had 33 marbles in his pocket . he lost some when he went outside to play . now he only has 18 marbles . how many marbles did peter lose ?
[A]: 15

[Q]: kelly had 56 apples . how many more apples does kelly need to pick to have 105 apples altogether ?
[A]: 49

[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 ?
[A]:
5