x² - 13x + 36 = 0
                        ( 4 )

x² + 5x + 6 = 0
                        (    )

x² - 7x - 18 = 0
                        (    )

x² + 7x + 10 = 0
                        (    )

x² - x - 6 = 0
                        (    )

x² - 4x - 12 = 0
                        (    )

x² - 4x - 12 = 0
                        (    )

x² - x - 72 = 0
                        (    )

x² - x - 6 = 0
                        (    )

x² + 6x - 27 = 0
                        (    )

                      +[    ]

x² - 12x + 35 = 0
                        (    )

x² + 2x - 48 = 0
                        (    )

x² + 16x + 64 = 0
                        (    )

x² + 14x + 49 = 0
                        (    )

x² + 13x + 40 = 0
                        (    )

x² - 9x + 18 = 0
                        (    )

x² - 17x + 72 = 0
                        (    )

x² + 11x + 28 = 0
                        (    )

x² - 10x + 21 = 0
                        (    )

x² - 9 = 0
                        (    )

                      +[    ]

x² - 14x + 48 = 0
                        (    )

x² + 18x + 81 = 0
                        (    )

x² + 2x - 15 = 0
                        (    )

x² + 2x - 24 = 0
                        (    )

x² + x - 20 = 0
                        (    )

x² + 2x - 8 = 0
                        (    )

x² + 4x - 45 = 0
                        (    )

x² + 12x + 32 = 0
                        (    )

x² - 12x + 27 = 0
                        (    )

x² + 8x + 12 = 0
                        (    )

                      +[    ]
                 +++[[       ]]