cyanyang441 cyanyang441 22-02-2024 Chemistry contestada Perform the operation indicated, then place the answer in the proper location on the grid. Write your answer in descending powers of m. a) -5m³ + 20m²n² - 3mn³ b) -5m³ - 20m²n² + 3mn³ c) -5m³ - 20m²n² - 3mn³ d) -5m³ + 20m²n² + 3mn³