instruction:
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.
question:
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 ?
answer:
43

question:
A florist had 50 roses . If she sold 15 of them and then later picked 21 more , how many roses would she have ?
answer:
56

question:
A waiter had 33 customers to wait on . If 31 customers left and he got another 26 customers , how many customers would he have ?
answer:
28