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

Input: Consider Input: Problem: the average weight of 4 person ' s increases by 8.5 kg when a new person comes in place of one of them weighing 95 kg . what might be the weight of the new person ?

Output: 129 kg

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: the average of all odd numbers up to 200 is
Output: 100