x² - 3x - 18 = 0
                        ( -3 )

x² - 12x + 35 = 0
                        (    )

x² - 81 = 0
                        (    )

x² - 64 = 0
                        (    )

x² + 5x + 6 = 0
                        (    )

x² - 5x - 36 = 0
                        (    )

x² - 14x + 49 = 0
                        (    )

x² - 5x - 24 = 0
                        (    )

x² - 25 = 0
                        (    )

x² - 2x - 8 = 0
                        (    )

                      +[    ]

x² + 5x + 6 = 0
                        (    )

x² + 12x + 36 = 0
                        (    )

x² + 17x + 72 = 0
                        (    )

x² + 15x + 56 = 0
                        (    )

x² - x - 30 = 0
                        (    )

x² - 5x - 36 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² + x - 72 = 0
                        (    )

x² - 9x + 18 = 0
                        (    )

x² - 3x - 28 = 0
                        (    )

                      +[    ]

x² + 15x + 54 = 0
                        (    )

x² + 5x - 24 = 0
                        (    )

x² - 6x - 16 = 0
                        (    )

x² - 6x + 8 = 0
                        (    )

x² + 4x - 32 = 0
                        (    )

x² - 8x + 12 = 0
                        (    )

x² - 4x + 4 = 0
                        (    )

x² - x - 30 = 0
                        (    )

x² - 16 = 0
                        (    )

x² + 6x + 8 = 0
                        (    )

                      +[    ]
                 +++[[       ]]