I caught an ad post extolling the virtues of a new math calc app.
From Mathcad , a name which I can too easily confuse with Matlab.
It's a presentation quality write it on paper approach, with
intermediate results available at all times. They offered a month's
trial, with a puzzle as bait: calculate the dynamics of a
laser straight railroad tunnel between NY and SF for a given train, with
given mass air density, coefficient of drag, g constant, effective cross
section area etc.
No rolling friction from the maglev - just drag force and gravity....
How much (constant) thrust, to get to the far end?
Toying with getting a copy, I noticed the going price is around $1 with
three zeroes.
So I started looking for discount/student versions etc.
And waddaya know: there was SMath - comparable to Mathcad but
attractively priced - free - with tutorials available too.
So I took a look. This does not produce presentation quality print outs,
but it does use the solvers and other bells and whistles that the
high-end calcs offer.
You might give it a try.