(2x²y - 5x² + 9y⁶) + (9x² + 6y⁶ - 8x²y) =

(a³b² + 2ab - 5ab³) - ( 2a³b² + 7ab³) =

(6x²yz³ - 8x²y²z²) + (16x²y²z² - 13x²yz³ + xy ) =

(8m⁵n³k) • (4m⁴k⁵) = (10a⁷b⁸) • (3ab⁶ + 7a⁸b⁹) =

(-9x⁴y⁶z³) • (7xy³ - 11xyz⁵ + 8x⁴z⁹) =

(2ab³ + 4a³bc²) • (5ab⁵ + 3a²b⁵c³) =

( x²y² - 6xy³) • (2x⁴ - 3x⁷y⁴ + 10x⁵z⁵) =

( 9x¹⁰y⁹) / ( 3x³y⁸) = (-28a⁶b⁷c⁸) ÷ ( 7a⁴cb³) =

(15m¹²n⁸ + 5m⁹n¹⁶) / (5m⁴n⁹) =

(36x¹⁰y⁵p⁹ - 45x⁷y⁶p⁸ + 27x⁸y⁸p⁶) ÷ (9x⁵y⁴p⁶) =

(8a⁵b⁸c⁹ - 16a¹⁸b⁷c⁶ + 24a⁷b⁹c⁹) / ( 8a⁴b³c⁵) =
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