Find the Sum or Difference $$\left( 5 x ^ { 4 } - 7 x ^ { 2 } + x \right) - \left( 9 x ^ { 3 } + 6 x ^ { 2 } + 2 x \right) + \left( 5 x ^ { 2 } - x \right)$$

Find the sum or difference.
- $$\left( 5 x ^ { 4 } - 7 x ^ { 2 } + x \right) - \left( 9 x ^ { 3 } + 6 x ^ { 2 } + 2 x \right) + \left( 5 x ^ { 2 } - x \right)$$

A) $- 1 x ^ { 5 } + 7 x ^ { 4 } - 2 x$
B) $5 x ^ { 4 } - 9 x ^ { 3 } - 6 x ^ { 2 } + 2 x$
C) $5 x ^ { 4 } - 9 x ^ { 3 } - 8 x ^ { 2 } - 2 x$
D) $5 x ^ { 4 } + 9 x ^ { 3 } - 18 x ^ { 2 } - 2 x$

Correct Answer:

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