Simplify the expression:
3x
3
+ 4x
2
- 3x + 2 - 5x
3
- 4x
2
+ 5x + 7
-2x
3
+ x
2
+ 2x + 9
2x
3
- 2x + 9
8x
3
+ 8x
2
+ 8x + 9
-2
3
+ 2x + 9
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