x² - 5x - 36 = 0
                        ( -4 )

x² - 81 = 0
                        (    )

x² - 4x - 45 = 0
                        (    )

x² + 11x + 28 = 0
                        (    )

x² - 5x - 24 = 0
                        (    )

x² + 2x - 63 = 0
                        (    )

x² + 7x + 10 = 0
                        (    )

x² - x - 72 = 0
                        (    )

x² - 16x + 63 = 0
                        (    )

x² + 15x + 54 = 0
                        (    )

                      +[    ]

x² - 15x + 54 = 0
                        (    )

x² + 3x - 54 = 0
                        (    )

x² + 2x - 35 = 0
                        (    )

x² - 9x + 18 = 0
                        (    )

x² - 14x + 48 = 0
                        (    )

x² + 3x - 10 = 0
                        (    )

x² + 6x - 27 = 0
                        (    )

x² - 11x + 28 = 0
                        (    )

x² + 2x - 24 = 0
                        (    )

x² - 16 = 0
                        (    )

                      +[    ]

x² + 2x - 8 = 0
                        (    )

x² + x - 6 = 0
                        (    )

x² + 16x + 64 = 0
                        (    )

x² + 3x - 10 = 0
                        (    )

x² - 16 = 0
                        (    )

x² - 10x + 25 = 0
                        (    )

x² - 8x + 12 = 0
                        (    )

x² - 81 = 0
                        (    )

x² - 2x - 8 = 0
                        (    )

x² + 13x + 42 = 0
                        (    )

                      +[    ]
                 +++[[       ]]