inline help for Maxima-packages



Am 07.11.2012 21:59, schrieb Wolfgang Dautermann:
> By just adding a few lines, that mark, where the documentation starts
> and ends one can enable it - for example for that package:
> http://wolfgang.dautermann.at/maxima/help_package.mac

Sorry, the 'patched' distrib-package can be found at:
http://wolfgang.dautermann.at/maxima/distrib.mac

But I have another question:
How can I omit the input and the result (false) in the following
example?
maxima --very-quiet --batch-string="tex('diff(x^2,x)=diff(x^2,x));"
                              d    2          2
                          tex(-- (x ) = diff(x , x))
                              dx
$${{d}\over{d\,x}}\,x^2=2\,x$$
                                     false

I want *only* the tex-output: $${{d}\over{d\,x}}\,x^2=2\,x$$ - nothing
else.

Is that possible with maxima (--very-quiet does not suppress the input
and the function-result) or must one use tools like sed, grep or perl or
something like that?

Best reards, Wolfgang