56×640-(11258-27×34)+374498

To solve the expression 56×640-(11258-27×34)+374498, follow the order of operations (PEMDAS/BODMAS):

First, solve any operations within parentheses:

11258 - 27 × 34 = 11258 - 918 = 10340

Now, calculate the multiplication and division, from left to right:

56 × 640 = 35840

Next, perform the addition and subtraction, from left to right:

35840 - 10340 = 25500

Finally, add the last number:

25500 + 374498 = 400998

Therefore, 56×640-(11258-27×34)+374498 = 400998.