Notes for AKT-090924-2/0:39:41

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Hints:

1. Leibniz rule for derivative of products:

\partial_x(f.g)=(\partial_x f) g +f (\partial_x g)

2. Iterated Leibniz rule (for expressions like (\partial_x \partial_y \partial_z) (f.g))

3. Leibniz rule in a discrete (combinatorial) setting:

Failed to parse (unknown function\doublepoint): (f.g)(\doublepoint)=f(\doublepoint)g(\overcrossing) + f(\undercrossing)g(\doublepoint)