This is a math problem that involves arithmetic operations. We can calculate it step by step using the order of operations (parentheses, exponents, multiplication, division, addition, subtraction).
First, we multiply:
13915 = 208518139 = 250215261 = 391518261 = 4698
Now, we add the results together:
2085 + 2502 + 3915 + 4698 = 13200
Therefore, 13915 + 18139 + 15261 + 18261 = 13200.
This is a math problem that involves arithmetic operations. We can calculate it step by step using the order of operations (parentheses, exponents, multiplication, division, addition, subtraction).
First, we multiply:
13915 = 2085
18139 = 2502
15261 = 3915
18261 = 4698
Now, we add the results together:
2085 + 2502 + 3915 + 4698 = 13200
Therefore, 13915 + 18139 + 15261 + 18261 = 13200.