5(d+7) + 14(d+7) + 9(d+7)

Expanding each term:

5d + 35 + 14d + 98 + 9d + 63

Combining like terms:

5d + 14d + 9d + 35 + 98 + 63
28d + 196

Therefore, (d+7)5(d+7)14(d+7)9 simplifies to 28d + 196.