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.
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Question: Vanessa had 13 music files and 30 video files on her flash drive . If she deleted 10 of the files , how many files were still on her flash drive ?

Answer: 33


Question: Nancy 's class is going on a field trip to the zoo . If each van can hold 5 people and there are 12 students and 3 adults going , how many vans will they need ?

Answer: 3


Question: Chloe was playing a trivia game . In the first round she scored 40 points and in the second round she scored 50 points . In the last round she lost 4 points . How many points did she have at the end of the game ?

Answer:
86