A woman died and left behind three daughters, grandchildren (daughter’s children), a full brother, a full sister, and sons of the full brother
Question

                A woman died and left behind three daughters, grandchildren from a daughter who died (males and females), a full brother, a full sister, and children of the full brother who died.
Praise be to Allah.If 
    the woman died and left behind three daughters, a full brother and sister, 
    children of the full brother, and sons and daughters of a deceased daughter, 
    then the estate is to be divided as follows: 

    The daughters get two thirds, because Allah, may He be exalted, says 
    (interpretation of the meaning):

    “if (there are) only daughters, two or more, their share is 
    two thirds of the inheritance”

    [an-Nisa’ 4:11]. 

    The full brother and the full sister get the remainder, on the grounds that 
    they are relatives on the father’s side, with the male getting the share of 
    two females, because Allah, may He be exalted, says (interpretation of the 
    meaning):

    “if there are brothers and sisters, the male will have twice 
    the share of the female”

    [an-Nisa’ 4:176]. 

    The children of the full brother do not get anything, because they are 
    prevented from inheriting by the presence of their paternal uncle. 

    Similarly, the children of the deceased daughter do not get anything, 
    because the children of daughters do not get a share of inheritance, whether 
    it is an allocated share or by virtue of being relatives on the father’s 
    side. 
So 
    the estate is divided into thirds: the daughters get two thirds, and the 
    brother and sister get one third. 
As 
    the share of the daughters cannot be divided properly – because their share 
    is two parts, and their number is three – and this is also the case with 
    regard to the brother and sister – their number is three and their share is 
    one part – the estate should be divided into nine parts, then the correct 
    way to divide it is as follows: 

    The daughters get two thirds of nine parts, which is six parts, each 
    daughter getting two parts. 

    The full brother and the full sister get the remainder, which is three 
    parts, with the male getting the share of two females. So the brother gets 
    two parts and the sister gets one part. 

    And Allah knows best.