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

x² - 17x + 72 = 0
                        (    )

x² - x - 20 = 0
                        (    )

x² - 3x - 28 = 0
                        (    )

x² + 12x + 36 = 0
                        (    )

x² - 12x + 35 = 0
                        (    )

x² - 7x + 12 = 0
                        (    )

x² + 3x - 10 = 0
                        (    )

x² + 9x + 20 = 0
                        (    )

x² - 13x + 40 = 0
                        (    )

                      +[    ]

x² - 13x + 40 = 0
                        (    )

x² + 13x + 42 = 0
                        (    )

x² - 9 = 0
                        (    )

x² - 12x + 32 = 0
                        (    )

x² - 8x + 15 = 0
                        (    )

x² - 2x - 24 = 0
                        (    )

x² - 5x - 14 = 0
                        (    )

x² + 10x + 24 = 0
                        (    )

x² - 11x + 24 = 0
                        (    )

x² - 6x - 16 = 0
                        (    )

                      +[    ]

x² - 81 = 0
                        (    )

x² + 2x - 24 = 0
                        (    )

x² + 4x - 12 = 0
                        (    )

x² - 9 = 0
                        (    )

x² - 13x + 40 = 0
                        (    )

x² + 4x - 21 = 0
                        (    )

x² + 12x + 35 = 0
                        (    )

x² - 8x + 16 = 0
                        (    )

x² - 10x + 25 = 0
                        (    )

x² + x - 56 = 0
                        (    )

                      +[    ]
                 +++[[       ]]