4.2.2

 AB 
[ 2, -1]
[-4,  5]

 AC 
[ 0, 0]
[-3, 3]

 AB + AC 
[ 2, -1]
[-7,  8]

 B + C 
[ 3, -3]
[-1,  2]

 A(B + C) 
[ 2, -1]
[-7,  8]

 A + B 
[ 3, -1]
[-2,  2]

 (A + B)^2 
[ 11, -5]
[-10,  6]

 A^2 
[-1,  2]
[-4, -1]

 B^2 
[4, -6]
[0,  1]

 A^2 + 2 AB + B^2 
[  7, -6]
[-12, 10]

 C^2 
[ 2, -2]
[-2,  2]

 C^3 
[ 4, -4]
[-4,  4]

 C^4 
[ 8, -8]
[-8,  8]

 C^5 
[ 16, -16]
[-16,  16]