A: {{1, 1, -1, -1}, {-2, -3, 4, 8}, {-1, -1, 3, 6}}
m1 = ReducedRowEchelonForm(A)
B: {{1, 1, 1, 1}, {1, -1, -1, 7}, {2, 1, 1, 5}, {4, -2, 3, 7}}
m2 = ReducedRowEchelonForm(B)
C: {{1, 1, 0, 1, 3}, {0, 0, 1, -1, 2}, {1, 1, -1, 2, 0}}
m3 = ReducedRowEchelonForm(C)
D: {{1, -1, 1, -2, 0}, {-2, 2, -1, 1, 0}}
m4 = ReducedRowEchelonForm(D)
E: {{2, 2, -3, 1, 1}, {1, 1, -1, 3, 4}, {1, 1, -2, -2, -3}}
m5 = ReducedRowEchelonForm(E)
F: {{2, 2, -3, 1, 0}, {1, 1, -1, 3, 0}, {1, 1, -2, -2, 0}}
m6 = ReducedRowEchelonForm(F)