Sure, but I have to launch the calculator, instead of just typing it into the ever present search bar of my persistent open browser.

If I could just type it into my shell, that would be nice. I’m sure there’s some command (or one could be trivially made) to evaluate an equation, but then you get to play game with shell expansions and quotes.

In emacs I have to convolute the equation into prefix.

All minor stuff but it adds up.