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Sorry, I've missed not `HoldForm` but `DisplayForm`. `DisplayForm // TraditionalForm` My concern was different - I have self-made functions that have a nice output that can should be used in text that accompanies the presentation. `HoldForm`...
My co-question in this regard: do someone think that the very concept of 'symbolic manipulation' is friendly for anybody outside WRI (sub)world? I'm not saying about attempts to make "introductory explanations" with the concepts of the same flavour.