Consider the following row reduction of the matrix M to the 4 x 4 identity matrix I4. M R2-3R1, R₁+R3 RA M₁ M3 R₁+2R3 M₁3R3 M5 R3+R4, M6 → 14 Here M₁, M2,..., Me are the matrices obtained after each step. Find the determinant of the initial matrix M. M2 R₂ RA

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