Is the division of land that took place after the father's death, where the sons took land near the buildings at a price of 250,0 EGP per qirat, while the daughters took other land at a price of 50,0 EGP per qirat, Islamically valid? And do the daughters have the right to demand exchanging one qirat of their land for one qirat of the higher-priced land?

Every heir owns their share of the inheritance in co-ownership. The inheritance, whether cash, assets, or debts, is shared among the heirs, and none of them may independently claim anything without a valid division. Land whose parts vary in value cannot be divided except with the mutual consent of all heirs, because this division is considered a sale, and no one can be compelled if they refuse. Therefore, the aforementioned division is invalid as long as there is no mutual consent among all heirs. Issues of dispute and contention, such as those related to inheritance, should be resolved through the Sharia judiciary or arbitration.