As mentioned in https://ask.libreoffice.org/t/operator-precedence-in-calc-any-overview/92393, we have operator precedence documented in ODF [1]; but the help misses that. The existing operator help [2] might be extended? [1] https://docs.oasis-open.org/office/OpenDocument/v1.3/os/part4-formula/OpenDocument-v1.3-os-part4-formula.html#Operators [2] https://help.libreoffice.org/latest/en-US/text/scalc/01/04060199.html?DbPAR=CALC
Olivier Hallot committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/help/commit/9615cb2ed0275615f853c027087fa5ef46f72eae tdf#156029 operator precedence in Calc