Find the product. (7m*2-3m-7)(m*2-7m-6)
A. 7m*2 +52m +28m2 - 67m +42
B. 7m*2 + 5m - 8m - 67m - 42
C. 7m*2 - 52m-28m2 +67m +42
D. 7m*2 - 5m - 8m2 +67m +42

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