I've met people who swear by Tex for presenting mathematical functions. I understand it took them quite some time to learn it, but now it's as frictionless as it could be for them.

Amontillado wrote:

Paul Korm makes a great point about familiarity begetting ease of use. I
find it difficult to use algebraic input calculators. If I work your
navigational calculations on an algebraic calculator your landing on the
moon may be more of an E-ticket ride than respect for mortality demands.
RPN, I fly and never make mistakes.

Well, of course I make mistakes. But with RPN I make them much more
efficiently.