det b2 a1 92 261 262 b1 b3 az 2b3 + det C2 a1 92 2b1 262 C1 C3 az 263 = det b₁ b2 b3 a1 a2 a3 + det b1 b2 b3 C2 c3 91 92 93 b₁ b2 b3 C1

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A:

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A:

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A:

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