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Algebra Comput."],"published-print":{"date-parts":[[2022,3]]},"abstract":"<jats:p>In order to find a suitable expression of an arbitrary square matrix over an arbitrary finite commutative ring, we prove that every such matrix is always representable as a sum of a potent matrix and a nilpotent matrix of order at most two when the Jacobson radical of the ring has zero-square. This somewhat extends results of ours in Linear Multilinear Algebra (2022) established for matrices considered on arbitrary fields. Our main theorem also improves on recent results due to Abyzov et al. in Mat. Zametki (2017), \u0160ter in Linear Algebra Appl. (2018) and Shitov in Indag. Math. 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