x² - 2x - 63 = 0
                        ( -7 )

x² - 16 = 0
                        (    )

x² - 3x - 28 = 0
                        (    )

x² + 12x + 32 = 0
                        (    )

x² - 2x - 35 = 0
                        (    )

x² - 25 = 0
                        (    )

x² - x - 56 = 0
                        (    )

x² + x - 56 = 0
                        (    )

x² - 3x - 28 = 0
                        (    )

x² - 15x + 56 = 0
                        (    )

                      +[    ]

x² - 8x + 16 = 0
                        (    )

x² + 14x + 48 = 0
                        (    )

x² + 4x - 12 = 0
                        (    )

x² - x - 20 = 0
                        (    )

x² + 2x - 48 = 0
                        (    )

x² - 12x + 32 = 0
                        (    )

x² - 9x + 20 = 0
                        (    )

x² - 9x + 18 = 0
                        (    )

x² - 9x + 14 = 0
                        (    )

x² + 17x + 72 = 0
                        (    )

                      +[    ]

x² + 2x - 8 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² + 2x - 48 = 0
                        (    )

x² - 5x - 24 = 0
                        (    )

x² - 11x + 30 = 0
                        (    )

x² - 4x - 21 = 0
                        (    )

x² - x - 42 = 0
                        (    )

x² + 9x + 20 = 0
                        (    )

x² - 12x + 27 = 0
                        (    )

x² + 9x + 20 = 0
                        (    )

                      +[    ]
                 +++[[       ]]