x² + 4x - 12 = 0
                        ( -6 )

x² + 2x - 35 = 0
                        (    )

x² - 16 = 0
                        (    )

x² - 7x + 10 = 0
                        (    )

x² - 25 = 0
                        (    )

x² + 11x + 28 = 0
                        (    )

x² - 2x - 15 = 0
                        (    )

x² + 6x - 27 = 0
                        (    )

x² - 6x - 16 = 0
                        (    )

x² + 5x - 24 = 0
                        (    )

                      +[    ]

x² - 81 = 0
                        (    )

x² + 5x + 6 = 0
                        (    )

x² + x - 72 = 0
                        (    )

x² - 3x - 40 = 0
                        (    )

x² - x - 56 = 0
                        (    )

x² + 2x - 63 = 0
                        (    )

x² + 7x - 18 = 0
                        (    )

x² + 9x + 20 = 0
                        (    )

x² + 11x + 30 = 0
                        (    )

x² + 11x + 18 = 0
                        (    )

                      +[    ]

x² + 4x - 21 = 0
                        (    )

x² - 6x - 27 = 0
                        (    )

x² + 2x - 15 = 0
                        (    )

x² - 17x + 72 = 0
                        (    )

x² - 7x - 18 = 0
                        (    )

x² + 16x + 63 = 0
                        (    )

x² - x - 30 = 0
                        (    )

x² - 81 = 0
                        (    )

x² + 3x - 54 = 0
                        (    )

x² + 3x - 40 = 0
                        (    )

                      +[    ]
                 +++[[       ]]