A1: 2
B1: 4
C1: 5
A2: 4
B2: -1
C2: -7
A3: 6
B3: 3
C3: -1
matrix1: {{A1, B1, C1}, {A2, B2, C2}, {A3, B3, C3}}
matrix2 = Invert(matrix1)
A8: -3
A9: 6
A10: 3
matrix3: {{A8}, {A9}, {A10}}
matrix4: (matrix2 * matrix3)