How is the inheritance calculated and divided among the aforementioned heirs, taking into account the will of $80,0 distributed among the children and the wife, his verbal will regarding his wife's residence in one of the two houses, the waiver of the two daughters of their shares to their brother and stepmother, and the mother of the deceased's demand for her right from the amount willed to the wife?

The inheritance is divided into 96 shares: 12 for the wife (one-eighth), 16 for the mother (one-sixth), 34 for the son, and 17 for each daughter. The brothers, sisters, and nephews receive nothing as they are excluded by the son. Bequests are executed from the inheritance before its division. A bequest to an heir is not permissible unless approved by the other heirs. Therefore, the mother, if she does not approve the execution of the bequest related to the wife, is entitled to take one-sixth of the amount bequeathed to her. The father's bequest for his wife to remain in his house for the duration of her life depends on the approval of all heirs. The second house is considered part of the inheritance and is to be divided among the heirs. Inheritance matters must be brought before the Sharia courts for investigation.