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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.
Input validation is out of spec in this kata. Don't make things unnecessarily complicated (and unfun).
I like the idea of testing operator precedence, but it would be great to include more equations (in other words, open it up outside of just the temperature equation, so you can test the user on more examples).
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