x² - 13x + 42 = 0
                        ( 6 )

x² + 7x + 12 = 0
                        (    )

x² - 16x + 64 = 0
                        (    )

x² - 10x + 24 = 0
                        (    )

x² + 2x - 35 = 0
                        (    )

x² + 12x + 35 = 0
                        (    )

x² + 5x + 6 = 0
                        (    )

x² - 5x + 6 = 0
                        (    )

x² + 2x - 15 = 0
                        (    )

x² - 7x + 12 = 0
                        (    )

                      +[    ]

x² - 9x + 18 = 0
                        (    )

x² - x - 12 = 0
                        (    )

x² + 5x + 6 = 0
                        (    )

x² + 10x + 16 = 0
                        (    )

x² - 6x - 27 = 0
                        (    )

x² - x - 30 = 0
                        (    )

x² - 2x - 15 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² - 5x - 36 = 0
                        (    )

x² + 11x + 30 = 0
                        (    )

                      +[    ]

x² + 10x + 16 = 0
                        (    )

x² - 2x - 35 = 0
                        (    )

x² - 11x + 28 = 0
                        (    )

x² + 12x + 35 = 0
                        (    )

x² - 3x - 10 = 0
                        (    )

x² - 6x - 16 = 0
                        (    )

x² + 3x - 28 = 0
                        (    )

x² + x - 20 = 0
                        (    )

x² + 12x + 35 = 0
                        (    )

x² - 16x + 63 = 0
                        (    )

                      +[    ]
                 +++[[       ]]