Add: (16bc-12cd)+(8cd-6bc+4bd)

To simplify this expression, first combine like terms:

(16bc - 12cd) + (8cd - 6bc + 4bd)
= 16bc - 12cd + 8cd - 6bc + 4bd
= (16bc - 6bc) + (-12cd + 8cd) + 4bd
= 10bc - 4cd + 4bd

Therefore, the simplified expression is 10bc - 4cd + 4bd.