'amalgamation of three' is a correct and usable part of a sentence in written English.
It is typically used to describe a combination or merging of something. For example, "This policy is an amalgamation of three separate ideas."
Canadian Mennonite University, an amalgamation of three smaller colleges, was established in 1998 in Winnipeg.
The present borough was formed in 1965 by the amalgamation of three former metropolitan boroughs, Bermondsey, Camberwell, and Southwark.
The ideal gas equation of state is an amalgamation of three ideal gas laws that were formulated independently.
Dwayne Johnson's character is an amalgamation of three other men involved in the crime, including Jorge Delgado, Schiller's former business partner who masterminded the kidnap and extortion scheme.
Husbands & Sons may sound like an existing Lawrence novel but is an amalgamation of three of his best plays: The Daughter-In-Law, A Collier's Friday Night and The Widowing Of Mrs Holroyd.
EnergySolutions, an amalgamation of three companies that recently announced plans to float on the New York Stock Exchange, is thought by some to be interested in becoming a partner in any new nuclear reactors built in Britain.
In 2013, there was an amalgamation of two units that shared space but were organizationally independent.
This summer, the Washington Convention and Sports Authority, the amalgamation of two agencies, rebranded itself Events DC.
Renato Curi Angolana "An amalgamation of two clubs: dell'Angolana and Renato Curi," wrote Fergal Hunter.
The only new Land was Thuringia, formed in 1919 from the amalgamation of seven small principalities.
