Thanks a lot for your reply!!
It shows me in an understandable way how it works or better to say why it
doesn't work the way I wanted it.
Well, I know that log(a*b) isn't log(a)*log(b). The truth is I don't want to
implement a mathematical law but only to test how Maxima works, especially
in this case how the substitution works.
Your explanation and the idea from Robert Dodier gives me a very good
insight and some stuff to think about.
With kind regards,
Raindrop
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