FASM

; Z = -X * (1 - X * Y)
format PE Console
entry start
include 'win32a.inc'

section '.const' data readable
    x dd 2
    y dd 2

section '.data' data readable writeable
    z            dd 0
    stringFormat db "Result: %d", 0

section '.code' code readable executable
start:
    mov  eax, [x]
    imul eax, [y]
    mov  [z], eax
    mov  eax, 1
    sub  eax, [z]
    imul eax, [x]
    imul eax, -1
    mov  [z], eax

    invoke printf, stringFormat, [z]
    invoke getch
    invoke ExitProcess, 0

section '.idata' data import readable
    library kernel, 'kernel32.dll',\
            msvcrt, 'msvcrt.dll'
    import kernel, ExitProcess, 'ExitProcess'
    import msvcrt,\
            printf, 'printf',\
            getch, '_getch'