[48] how to simplify derivative?

[Thomas Klemm]

(07-18-2023 07:54 PM)BruceH Wrote:  You can use the MATCH↓ and MATCH↑ commands to create your own functions to carry out these transformations.

The second argument would be for instance:

{'(&Z)^2' '&Z*&Z'}

This can be done before entering the equation editor.

Not sure about the trigonometric identity though.
It seems easier to replace the sum by 1 manually in the editor than writing a pattern.
But then you'd have to know in advance that you will need this value and put it on the stack.