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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.
you should use abs(number) to your code
yes
Based on the description I think you need to take the absolute value of the number first. Resulting in 3 + 2 = 5.