|A1,2A3,A2| = -|A1,A2,2A3| = -2|A1,A2,A3| = -2|A| = 4.
|A3-2A1,3A2,A1|
c1+2c3
= |A3,3A2,A1|
= 3|A3,A2,A1|
= -3|A1,A2,A3|
= 6.
|A1,2A3,A2| = -|A1,A2,2A3| = -2|A1,A2,A3| = -2|A| = 4.
|A3-2A1,3A2,A1|
c1+2c3
= |A3,3A2,A1|
= 3|A3,A2,A1|
= -3|A1,A2,A3|
= 6.