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16. Find the product 24x1-2x) and evaluate it for x = 2.17. Find the product abta'+b) and evaluate it for a = 2 and b18. Find the product sis" - st)and find its value for s = 2 and t = 3.19. Find the product - 3y (xy + y) and find its value for x = 4 and y =

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