x² - 3x - 54 = 0
                        ( -6 )

x² - 17x + 72 = 0
                        (    )

x² - x - 12 = 0
                        (    )

x² - 3x - 40 = 0
                        (    )

x² + 12x + 35 = 0
                        (    )

x² - 11x + 30 = 0
                        (    )

x² - 8x + 15 = 0
                        (    )

x² + 13x + 36 = 0
                        (    )

x² - 15x + 54 = 0
                        (    )

x² + 3x - 54 = 0
                        (    )

                      +[    ]

x² + 6x - 16 = 0
                        (    )

x² + 3x - 40 = 0
                        (    )

x² - 6x - 16 = 0
                        (    )

x² + 9x + 20 = 0
                        (    )

x² + 14x + 45 = 0
                        (    )

x² + 17x + 72 = 0
                        (    )

x² + x - 56 = 0
                        (    )

x² + 2x - 24 = 0
                        (    )

x² + 9x + 18 = 0
                        (    )

x² - 13x + 36 = 0
                        (    )

                      +[    ]

x² - 5x + 6 = 0
                        (    )

x² + 6x + 8 = 0
                        (    )

x² + 10x + 16 = 0
                        (    )

x² + 7x - 18 = 0
                        (    )

x² - 17x + 72 = 0
                        (    )

x² - 7x - 18 = 0
                        (    )

x² + 3x - 28 = 0
                        (    )

x² + 2x - 24 = 0
                        (    )

x² + 14x + 48 = 0
                        (    )

x² - 10x + 24 = 0
                        (    )

                      +[    ]
                 +++[[       ]]