Can an inheritance be calculated for a deceased man who left behind: (two sons of a son), (three daughters), (three daughters of a son), and (a wife who died before the distribution and who has a full brother), knowing that he bequeathed one of the houses to his deceased son's children (three daughters and two sons), thinking that they do not inherit?

A grandfather's bequest to his grandchildren who are heirs is not permissible unless approved by the adult heirs. The testator's assumption that they are not heirs is irrelevant, as what matters is the reality. If the beneficiaries were not heirs at the time of the bequest but became heirs at the time of death, the bequest becomes void.

If the heirs are a wife, daughters, grandsons, and granddaughters, the wife receives one-eighth, the daughters two-thirds, and the remainder goes to the grandsons, with the male receiving the share of two females. If the wife dies before receiving her share, her share is transferred to her heirs.