x² - 16x + 64 = 0
                        ( 8 )

x² + 6x - 16 = 0
                        (    )

x² + 9x + 14 = 0
                        (    )

x² + 5x - 24 = 0
                        (    )

x² - 18x + 81 = 0
                        (    )

x² + 9x + 18 = 0
                        (    )

x² - 8x + 16 = 0
                        (    )

x² - 6x - 27 = 0
                        (    )

x² + 15x + 54 = 0
                        (    )

x² + 15x + 54 = 0
                        (    )

                      +[    ]

x² + 15x + 54 = 0
                        (    )

x² - 10x + 21 = 0
                        (    )

x² - 49 = 0
                        (    )

x² + 6x + 9 = 0
                        (    )

x² - 4x - 45 = 0
                        (    )

x² - 49 = 0
                        (    )

x² + 8x + 15 = 0
                        (    )

x² - 81 = 0
                        (    )

x² + 4x - 12 = 0
                        (    )

x² - 15x + 56 = 0
                        (    )

                      +[    ]

x² + 3x - 10 = 0
                        (    )

x² - 10x + 16 = 0
                        (    )

x² - 11x + 28 = 0
                        (    )

x² + 6x - 27 = 0
                        (    )

x² - 15x + 54 = 0
                        (    )

x² + 11x + 24 = 0
                        (    )

x² + 13x + 40 = 0
                        (    )

x² + x - 72 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² + 14x + 48 = 0
                        (    )

                      +[    ]
                 +++[[       ]]