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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
There are already plenty of similar exercises to this on this website, we do not really need any more Fibonacci exercises, do we?
Description is not clear, what a sum should be found...
Please, show more examples how to calculate the sum you are looking for...