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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.
as shown in the Example Tests
In Haskell only
1 + tan(x)^2is acceptedWhich language are you working with? Both versions of tan'(x) should be accepted, at least in the C#, Java and JS versions of the kata.
The expected format is given both by example tests and the way the derivation rules are described.
Read through the discourse posts below, people (including me) complain a lot on the way how tests work, and you can find some hints which forms you sohuld follow, what is expected order of operations, etc.