Add (4d - 3) + (12d + 4)

To add (4d - 3) + (12d + 4), we need to combine like terms.

First, let's add the terms with d.
4d + 12d = 16d

Next, let's add the constant terms.
-3 + 4 = 1

Therefore, (4d - 3) + (12d + 4) simplifies to 16d + 1.