x² + 7x + 12 = 0
                        ( -4 )

x² + 13x + 42 = 0
                        (    )

x² + 4x - 21 = 0
                        (    )

x² + 4x + 4 = 0
                        (    )

x² - 2x - 48 = 0
                        (    )

x² - 15x + 54 = 0
                        (    )

x² - 5x - 14 = 0
                        (    )

x² - 14x + 45 = 0
                        (    )

x² - 4x - 21 = 0
                        (    )

x² - 12x + 32 = 0
                        (    )

                      +[    ]

x² + 5x + 6 = 0
                        (    )

x² - 8x + 12 = 0
                        (    )

x² + 12x + 35 = 0
                        (    )

x² - 14x + 48 = 0
                        (    )

x² + 12x + 36 = 0
                        (    )

x² + 6x - 27 = 0
                        (    )

x² + 12x + 36 = 0
                        (    )

x² - 6x - 16 = 0
                        (    )

x² - 5x - 24 = 0
                        (    )

x² + 6x - 16 = 0
                        (    )

                      +[    ]

x² - 2x - 63 = 0
                        (    )

x² - 11x + 30 = 0
                        (    )

x² - 5x + 6 = 0
                        (    )

x² + 2x - 8 = 0
                        (    )

x² + 2x - 63 = 0
                        (    )

x² + x - 20 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² + 12x + 32 = 0
                        (    )

x² + 7x - 18 = 0
                        (    )

x² - 6x + 9 = 0
                        (    )

                      +[    ]
                 +++[[       ]]