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Let ▫$R$▫ be a ring and let ▫$n \ge 2$▫. We discuss the question of whether every element in the matrix ring ▫$M_n(R)$▫ is a product of (additive) commutators ▫$[x, y] = xy−yx$▫, for ▫$x,y \in M_n(R)$▫. An example showing that this does not always hold, even when ▫$R$▫ is commutative, is provided. I ...