How is inheritance calculated if the deceased left behind a mother, two daughters, and a wife?

The inheritance is divided into forty shares. If the deceased left only those mentioned, then the mother receives one-sixth as a prescribed share due to the presence of a descendant heir. His wife receives one-eighth as a prescribed share due to the presence of a descendant heir. His two daughters receive two-thirds as a prescribed share. The remainder is returned to the mother and the two daughters. So, the wife receives five shares (her one-eighth) as a prescribed share. The mother receives seven shares as a prescribed share and a return. And each daughter receives fourteen shares as a prescribed share and a return. The matter of inheritances must be referred to the Sharia courts for consideration, as there may be another heir, or wills or debts that take precedence over the rights of the heirs.