how do i solve the equation:

-2(-8-4)^2+-8-4/4

please show step by stap HELP PLEASE

It's not an equation because it has no equal sign.

-2(-8-4)^2+-8-4/4

(-2 * -12)^2 + 8 - 1
24^2 + 7
576 + 7 = 583