Tolong ka pleasseee ntar d kumpulin, yang di lingkari

2. (2x + 5)-(x-3) = 2x + 5 - x + 3
                          = 2x - x + 5 + 3
                          = x + 8

5. (3x² + 2x - 1) + (x² - 5x + 6) = 3x² + 2x - 1 + x² - 5x + 6
                                                = 3x² + x² + 2x - 5x - 1 + 6
                                                = 4x² - 3x - 5

7. (y² - 3) - (4y² + 5y + 6) = y² - 3 - 4y² - 5y - 6
                                        = y² - 4y² - 5y - 3 - 6
                                        = -3y² - 5y - 9