x² + 12x + 36 = 0
                        ( -6 )

x² + 17x + 72 = 0
                        (    )

x² + 3x - 18 = 0
                        (    )

x² - 11x + 24 = 0
                        (    )

x² - 10x + 24 = 0
                        (    )

x² - 16 = 0
                        (    )

x² - 16 = 0
                        (    )

x² - 9 = 0
                        (    )

x² - 9x + 18 = 0
                        (    )

x² - 13x + 36 = 0
                        (    )

                      +[    ]

x² + 10x + 16 = 0
                        (    )

x² + 12x + 27 = 0
                        (    )

x² + 10x + 24 = 0
                        (    )

x² - x - 30 = 0
                        (    )

x² - 16x + 64 = 0
                        (    )

x² + 2x - 35 = 0
                        (    )

x² - 9 = 0
                        (    )

x² - 36 = 0
                        (    )

x² - x - 12 = 0
                        (    )

x² - 12x + 36 = 0
                        (    )

                      +[    ]

x² - 17x + 72 = 0
                        (    )

x² + 7x + 12 = 0
                        (    )

x² - 4x - 45 = 0
                        (    )

x² + 10x + 21 = 0
                        (    )

x² + 11x + 24 = 0
                        (    )

x² - 7x + 12 = 0
                        (    )

x² + 11x + 18 = 0
                        (    )

x² + 4x - 32 = 0
                        (    )

x² + 13x + 36 = 0
                        (    )

x² - 10x + 21 = 0
                        (    )

                      +[    ]
                 +++[[       ]]