If A=(1 0 0 0), B=(0 1 0 0), C=(0 0 1 0), and D=(0 0 0 1),

If A=(1 0 0 0), B=(0 1 0 0), C=(0 0 1 0), and D=(0 0 0 1), find a expression in terms of A, B, C, and D for the matrix (7 6 4 3).