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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.
I don't think this kata should focus on text handling as much as it does.. Why don't just
1(variable)
for convenience? Ugh..This kata has too much text handling. No one needs cases like "x+2=y", that's just extra annoyance.