x² + 8x + 16 = 0
                        ( -4 )

x² + 11x + 30 = 0
                        (    )

x² + 10x + 21 = 0
                        (    )

x² + 8x + 12 = 0
                        (    )

x² + 7x + 12 = 0
                        (    )

x² + 12x + 32 = 0
                        (    )

x² + 15x + 56 = 0
                        (    )

x² + 11x + 24 = 0
                        (    )

x² + 5x + 6 = 0
                        (    )

x² + 6x + 8 = 0
                        (    )

                      +[    ]

x² + 12x + 32 = 0
                        (    )

x² + 4x + 4 = 0
                        (    )

x² + 9x + 20 = 0
                        (    )

x² + 8x + 16 = 0
                        (    )

x² + 17x + 72 = 0
                        (    )

x² + 12x + 27 = 0
                        (    )

x² + 7x + 12 = 0
                        (    )

x² + 14x + 48 = 0
                        (    )

x² + 9x + 18 = 0
                        (    )

x² + 16x + 63 = 0
                        (    )

                      +[    ]

x² + 6x + 8 = 0
                        (    )

x² + 8x + 12 = 0
                        (    )

x² + 13x + 42 = 0
                        (    )

x² + 8x + 12 = 0
                        (    )

x² + 10x + 24 = 0
                        (    )

x² + 10x + 24 = 0
                        (    )

x² + 11x + 28 = 0
                        (    )

x² + 11x + 24 = 0
                        (    )

x² + 8x + 15 = 0
                        (    )

x² + 12x + 36 = 0
                        (    )

                      +[    ]
                 +++[[       ]]