>>105844561
Those are calculator for babies, real men use:
>giac/xcas
>emacs calc (has cas mode)
>python3 (most powerful if you know a few libraries, you can do DDA in it)
>octave
>scilab if you want free matlab
>geogebra if you need visual stuff
>bc for very basic stuff
>kalc

overall the best setup is python3 + gnuplot

non-shitty proprietary options:
>matlab (work pays for it)
>maple (used to have a good cli)