How is an inheritance divided among a mother, a wife, two sons, a full brother, and three full sisters?

The mother receives one-sixth due to the presence of a lineal descendant and multiple siblings. The wife receives one-eighth due to the presence of a lineal descendant. The remainder goes to the two sons by ta'sib (residuary heirship). The brother and sisters receive nothing, as they are excluded by the son. The inheritance is divided into 48 shares: the mother receives 8 shares, the wife receives 6 shares, and each son receives 17 shares. Issues related to inheritances must be referred to the Sharia courts for investigation.