56×640-(11258-27×34)+374498

To solve this expression, follow the order of operations (also known as PEMDAS):

1. First, calculate the multiplication:

56 × 640 = 35,840

2. Next, evaluate the subtraction inside the parentheses:

11258 - (27 × 34) = 11258 - 918 = 10,340

3. Now, substitute the above results into the expression:

35,840 - 10,340 + 374498

4. Finally, perform the addition and subtraction:

35,840 - 10,340 + 374,498 = 400,998

So, the answer is 400,998.