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The Racah algebra $\\Re$ is the unital associative $\\mathbb{F}$-algebra defined by generators and relations in the following way. The generators are $A$, $B$, $C$, $D$. The relations assert that \\begin{equation*} [A,B]=[B,C]=[C,A]=2D \\end{equation*} and each of the elements \\begin{gather*} \\alpha=[A,D]+AC-BA, \\qquad \\beta=[B,D]+BA-CB, \\qquad \\gamma=[C,D]+CB-AC \\end{gather*} is central in $\\Re$. 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