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

Input: Consider Input: Problem: the total age of a and b is 12 years more than the total age of b and c . c is how many year younger than a

Output: 12


Input: Consider Input: Problem: if x = 1 + √ 2 , then what is the value of x 4 - 4 x 3 + 4 x 2 + 3 ?

Output: 4


Input: Consider Input: Problem: a student got 70 % in one subject , 80 % in other . to get overall 75 % how much he should get in third subject .


Output: 75 %