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.

[Q]: Sam grew 4 watermelons , but the rabbits ate 3 watermelons . How many watermelons does Sam have left ?
[A]: 1


[Q]: Megan 's class is going on a field trip to the zoo . If each van can hold 5 people and there are 25 students and 5 adults going , how many vans will they need ?
[A]: 6


[Q]: Zoe bought two coloring books . One had 44 pictures and the other had 44 . After one week she had already colored 20 of the pictures . How many pictures does she still have to color ?
[A]:
68