Find the Sum or Difference $$\left( 6 x ^ { 4 } - 8 x ^ { 2 } + x \right) - \left( 9 x ^ { 3 } + 6 x ^ { 2 } + 3 x \right) + \left( 3 x ^ { 2 } - x \right)$$

Find the sum or difference.
- $$\left( 6 x ^ { 4 } - 8 x ^ { 2 } + x \right) - \left( 9 x ^ { 3 } + 6 x ^ { 2 } + 3 x \right) + \left( 3 x ^ { 2 } - x \right)$$

A) $2 x ^ { 5 } + 7 x ^ { 4 } - 3 x$
B) $6 x ^ { 4 } - 9 x ^ { 3 } - 11 x ^ { 2 } - 3 x$
C) $6 x ^ { 4 } + 9 x ^ { 3 } - 17 x ^ { 2 } - 3 x$
D) $6 x ^ { 4 } - 9 x ^ { 3 } - 9 x ^ { 2 } + 3 x$

Correct Answer:

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