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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 believe it means you have to replace x by the provided value (the "point") so that you can evaluate the equation, transforming it into a scalar. For example, evaluating (without derivation) the expression "x^2-7" at the point x=3 gives 3^2-7 = 9-7 = 2, a scalar.
What is meant by 'a point to evaluate the equation as an integer'? Thanks!