see meta bug 70798.
Winfried Donkers committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=8539039e0c108da7d0306c37962415ce7e271c84 fdo#71936 Add Excel 2010 functions GAMMA.DIST, GAMMA.INV, GAMMALN.PRECISE The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.