Who are the heirs of a deceased mother who has a husband and two daughters, and living sisters' daughters, and deceased brothers' sons? And who are the heirs of a deceased mother who has only two daughters, and living sisters' daughters, and deceased brothers' sons?

The information provided is insufficient to determine how the inheritance should be divided due to ambiguity in identifying the heirs. They can be precisely identified through the attached link.

In summary, if she passed away leaving: A husband, two daughters, full sisters, and sons of a full brother: The husband receives one-fourth, the two daughters two-thirds, and the remainder goes to the full sisters. The sons of the full brother receive nothing. Two daughters, full sisters, and sons of a full brother: The two daughters receive two-thirds, and the remainder goes to the full sisters. The sons of the full brother receive nothing.