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

Input: Consider Input: Problem: what is the sum of the odd integers from 55 to 75 , inclusive ?

Output: 71

Input: Consider Input: Problem: the population of a city is 415600 . it increased by 25 % in the first year and decreased by 30 % in the second year . what is the population of the city at the end of second year ?

Output: 363650

Input: Consider Input: Problem: the probability of two events a and b are 0.20 and 0.40 respectively . the probability that both a and b occur is 0.15 . the probability that neither a nor b occur is _________
Output: 0.55