How to calculate the determinant {1123} {123-1} {3-1-1-2} {23-1-1}

R 4-R 1-r 2, R 2-r 1, R 3-3 r 11 1 2 3 0 1 1 - 4 0 - 4 - 7 - 11 0 0 0 0 - 6 - 3 R 3 + 4 R 21 1 2 3 0 1 1 - 4 0 0 0 - 3 - 27 0 0 0 - 6 - 3 R 4-2 r 31 1 2 3 0 1 1 - 4 0 - 3 - 27 0 0 0 5 1 determinant = - 3 * 51 = - 153 satisfied please

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