The task is to generate the correct answer for a given math problem.

Ex Input:
Problem: the set s consists of 5 numbers : { 1 , 2,3 , 4,5 } . if all possible subsets including the null set are created and one subset is chosen at random , what is the probability that the subset has 3 or 4 as its largest number ?

Ex Output:
3 / 8


Ex Input:
Problem: ? x 12 = 173 x 240

Ex Output:
3460


Ex Input:
Problem: in δ pqs above , if pq = 2 and ps = 3 , then

Ex Output:

3 / 2