Although I agree that such auto-simplification would hide what is happening
in normalize but otherwise why do you say that it is undesirable?

On 25 September 2014 20:16, Waldek Hebisch <[email protected]> wrote:

> kfp wrote:
> >
> > BTW OpenAxiom gives a correct answer.
>
> Well, old version of FriCAS did:
>
> (3) -> asin(sin(x))
>
>    (3)  x
>                                                     Type:
> Expression(Integer)
>
> But this simplification is undesirable outside of 'normalize'
> and is no longer applied by default.
>
>
>
>
> --
>                               Waldek Hebisch
> [email protected]
>
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