Polynomial equation for chart's trend line

Hi there, is there any possibility to add polynomial equation for chart’s trend line? As long as I noticed, there only linear, log, power, and exponential.

Thank you.

Very old demand:

in OOo times: https://issues.apache.org/ooo/show_bug.cgi?id=20819

in LO: https://bugs.freedesktop.org/show_bug.cgi?id=35712

As a workaround you can use this extension: http://extensions.libreoffice.org/extension-center/improved-trend-lines

Note: fdo#35712 has recently (July 2013) seen some activity in getting this feature working for LO.

Submit an enhancement “Bug” in Bugzilla