Find the product.
1. (2x + y (2x - y)
2. (3m- 4n2|3m3+4n2)
3. (5a + b 5a - b)
4.(5x + 2)2
5. (2x - 3y)2
6. Zc + 4)2
7. (2x + 2y + 2z)
8. x + 1)
9. (x - 1)
10. (a + 10a - 10)
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