Re: [Maxima-discuss] How do I "unquote" 'integrate(cos(y),y) ?

[Stavros M. <mac...@al...>]

ev(...,integrate) or ev(...,nouns)

On Thu, Jun 23, 2022, 21:48 Eduardo Ochs <edu...@gm...> wrote:

> Hi list,
>
> I'm trying to write code that will solve some basic problems of
> integration by change of variables "step by step"... my first example
> starts with:
>
>   ex0 : 'integrate((3*cos(2 + sqrt(3*x+4))) / (2*sqrt(3*x+4)), x);
>   ex1 :  integrate((3*cos(2 + sqrt(3*x+4))) / (2*sqrt(3*x+4)), x);
>   ex2 : changevar(ex0, u=3*x, u, x);
>   ex3 : changevar(ex2, v=u+4, v, u);
>   assume(w>0);
>   ex4 : changevar(ex3, w=sqrt(v), w, v);
>   ex5 : changevar(ex4, y=2+w, y, w);
>   display2d : false;
>   ex5 ;
>
> but how do I make Maxima integrate ex5? Its value is:
>
>   'integrate(cos(y),y)
>
> I know how to use the quote to make Maxima _avoid solving_ an integral
> - see ex0 and ex1 above - but how do I maka Maxima solve the integral
> in ex5? I made several attempts using ev, simp:true, and quote-quote,
> but none of them worked...
>
>   Thanks in advance!
>     Eduardo Ochs
>     http://angg.twu.net/eev-maxima.html
>
>
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