(%i1)

A:matrix([1,0,2],[2,1,3],[0,1,1]);

(%i2)

determinant(A);

(%i3)

B:matrix([3,-2,1],[-5,3,4],[2,1,3]);

(%i4)

determinant(B);

(%i5)

C:matrix([3,1,1,1],[1,3,1,1],[1,1,3,1],[1,1,1,3]);

(%i6)

determinant(C);

(%i7)

D:matrix([3,4,-3,-1,2],[-5,6,5,2,3],[4,-9,-3,7,-5],[-1,-4,1,1,-2],[-3,7,5,2,3]);

(%i8)

determinant(D);

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Created with wxMaxima.