To solve this expression, we have to follow the order of operations:

3495 / 5 = 699

1288 + 6 = 1294

Now we have:

699 - 1294 + 6 × 378

Next, we multiply 6 by 378:

6 x 378 = 2,268

Now we have:

699 - 1294 + 2,268

Now we add and subtract:

699 - 1294 = -595

-595 + 2,268 = 1,673

Therefore, the final answer is 1,673.