Do the children of a son who died during his father's lifetime inherit, given that the deceased also has sons and daughters?

The son who dies during his mother's lifetime does not inherit from her. His children do not inherit from their grandmother due to the presence of their uncle, who completely disinherits them. If a woman has no heirs except her son and her three daughters, the inheritance is divided among them, with the male receiving the share of two females. This means it is divided into five shares: two shares for the son and one share for each daughter.