Adding and Subtracting Polynomials

(3r + 9r - 7) - (2r + 8r - 6r²)

(5q - 3q) + (7q³ + 2)

(5d - 3d²) - (2d² + 8d)

(4d² + 8d²) + (5d + 7d² +9d)

(4 + 3c³) + (6c³ - 2)

(7 + 3h²-6h) + (8h + 9h² - 2)

(9g+ 2g³) - (3g³ + 8g - 5g)

(3p - 7 - 6p²) + (p + 8p² + 9)

(5c + 3c³ - 8) - (7c³ - 9c² + 6)

(6z² + 7) - (3z² + 5 - z³)