Complex sentence: Exceptions are monarchs of the Netherlands, Luxembourg, Malaysia and Cambodia have abdicated as a result of old age and it is considered normal and the last three monarchs Wilhelmina, Juliana, and Beatrix have all abdicated.
Split into simpler sentences: Exceptions are monarchs of the Netherlands, Luxembourg, Malaysia and Cambodia have abdicated as a result of old age. In the Netherlands the last three monarchs Wilhelmina, Juliana, and Beatrix have all abdicated.