What is the determinant of the upper triangular matrix? B=(−25−13042−300−310002)B = \begin{pmatrix} -2 & 5 & -1 & 3 \\ 0 & 4 & 2 & -3 \\ 0 & 0 & -3 & 1 \\ 0 & 0 & 0 & 2 \end{pmatrix}B=−20005400−12−303−312
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48