Perform the indicated operations and simplify the expression. 
Definitions:
Feudalism
A socio-economic system in medieval Europe where land was held by nobles in exchange for military service, and vassals were tenants of the nobles, while serfs worked the land.
Patrimonialism
A form of governance or organization where all power is held by a single ruler or authority, often based on traditional or familial ties.
Gerontocracy
A form of social structure where the power is heavily concentrated in the hands of older members of society, often marginalizing younger generations.
Contractual Relationships
Contractual Relationships refer to a legally binding agreement between two or more parties, typically involving the exchange of goods, services, money, or promises.
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