multiply the given polynomial
1. (5x + 2) (7x - 2)
2. (2a - 8b) (6a - 8b)
3. (7m - 5n) (2m + 5n)
4. (2a - 6b) (7a - 3b)
5. (x + 6y) (5x + 7y)
6. (6a - 6) (-2a^2 - 4a - 8)
7. (-6m + 6) (3m^2 + 4m - 3)
8. (3x - y) (6x^2 + 5xy - 7y2)
9. (3x + 8y) (2x^2 - 4xy + 6y^2)
10. (r^2 + 6r + 5) (5r^2 + r - 5)
11. (-3m^3 - 3mn - 8n^2) (8m^2 + mn + n^2)
12. (-8n^2 - n + 7) ( 5n + 4)
13. (-6b^2 + b + 6) (-b + 8)
14. (x^2 + 2xy + y^2) (x - 2y)
15. (6m - 8mn + 4n^2) (8m + 8n)


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