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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.
It's not clear from the description what
means. Only after reading the comments I understood that these are
x = 1; x = 2; x = 3. The "first 3" on its own has no well-defined meaning because quadratic functions are defined on ℝ, from -∞ to +∞. Why not start at0? or-666? or1748? It's arbitrary, so it should be specified