Perform the indicated operations and simplify. 
Definitions:
U.S. Firms
Companies or businesses that are incorporated or operate in the United States, across various industries.
Germany
A country in Central Europe known for its rich history, culture, and significant contributions to science, arts, and philosophy.
Marriage
A legally and socially sanctioned union between individuals that establishes rights and obligations between them and their children, and in-laws.
Fatherhood
The state or responsibility of being a father, including the duties, challenges, and emotional aspects of raising and caring for children.
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