Re: [Maxima-discuss] Basic simplify question

[Richard F. <fa...@gm...>]

 I agree with Ray on this. Note that
factor operates on the rational form of tst, and
rat(tst) produces

(x*%e^cos(x+1)+x)/%e^cos(x+1)

in essence, the exp(-cos(x+1))     is "simplified"   to  1/ exp(cos(x+1))
before factoring.

If the user wants exp(-cos(x+1))  to be treated as a single unit, then use
a symbol,
like emcosxp1   for manipulation,  at least until such time as some
property
related to x  or cos ... is needed.

factor( x* emcosxp1+x)  produces what you might expect.

RJF


On Mon, Nov 10, 2025 at 9:02 AM Raymond Toy <toy...@gm...> wrote:

>
> On 11/10/25 1:35 AM, Gunter Königsmann via Maxima-discuss wrote:
>
> Dear all,
>
> A colleague of mine has asked me how to factor out the x in
>
> tst:x*exp(-cos(x+1))+x;
>
> factor(tst) factorizes the exp() function, as well, which doesn't meet my
> colleague's idea of "simple".
>
> He wants the result to be `x*(1+exp(-cos(x+1))`?
>
> I thought maybe `factorout` would do this, but it doesn't.
>
> I've generally given up on finding ways to make Maxima produce the form I
> want and just accept what Maxima produces.  If I really, really want a
> certain form, I just do it by hand.  In this case, do `x*expand(tst/x)`.
> Sometimes it's just easier to do by hand instead of spending minutes or
> hours trying to figure out how to get Maxima to do it.  Especially if it's
> just a one-time change.
>
>
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