x² - 49 = 0
                        ( -7 )

x² - 14x + 45 = 0
                        (    )

x² - 10x + 21 = 0
                        (    )

x² + 5x - 36 = 0
                        (    )

x² - 6x - 27 = 0
                        (    )

x² + 6x + 8 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² - 6x - 27 = 0
                        (    )

x² - x - 12 = 0
                        (    )

x² + 3x - 28 = 0
                        (    )

                      +[    ]

x² - 4x - 12 = 0
                        (    )

x² - x - 42 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² - 12x + 27 = 0
                        (    )

x² + x - 12 = 0
                        (    )

x² + 2x - 48 = 0
                        (    )

x² + 4x - 21 = 0
                        (    )

x² + 5x - 36 = 0
                        (    )

x² + 3x - 18 = 0
                        (    )

x² - 2x - 8 = 0
                        (    )

                      +[    ]

x² - 5x + 6 = 0
                        (    )

x² - 17x + 72 = 0
                        (    )

x² - 64 = 0
                        (    )

x² + 18x + 81 = 0
                        (    )

x² - 10x + 24 = 0
                        (    )

x² - 3x - 40 = 0
                        (    )

x² - 9 = 0
                        (    )

x² - 6x + 9 = 0
                        (    )

x² - 4 = 0
                        (    )

x² - 2x - 8 = 0
                        (    )

                      +[    ]
                 +++[[       ]]