This is one of four cache for the “Path by math”. There are three cache have mathematical problems. The answer in this cache would be C1-C4
In cache,there have two answers for mathematical problems, will be one of the conditions to find another cache. You can take the title in order to find the answer. There are three of these, you must to find all cache and get the answers to each question. So you can get the correct coordinates and find the final cache. Good luck！
Because of my mistake, the topic of C1-C4 didn't put in the cache. So you can look at the pictures until I have time to change the mistake. Sorry again.