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.

In fourth grade there were 11 students at the start of the year . During the year 6 students left and 42 new students came to school . How many students were in fourth grade at the end ?
47

Will was organizing his baseball cards in a binder with 3 on each page . If he had 8 new cards and 10 old cards to put in the binder , how many pages would he use ?
6

Isabel had 2 pages of math homework and 4 pages of reading homework . If each page had 5 problems on it , how many problems did she have to complete total ?
30