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Find an optimal parenthesization of A1 x A2 x A3 x A4 where A1 is a 2 x 4 matrix, A2 is a 4 x

Find an optimal parenthesization of A1 x A2 x A3 x A4 where A1 is a 2 x 4 matrix, A2 is a 4 x 5 matrix, A3 is a 5 x 3 matrix, and A4 is a 3 x 2 matrix. What is the cost of an optimal solution?

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