Find the Sum or Difference $$\left( 5 x ^ { 4 } + 3 x ^ { 6 } - 5 + 7 x ^ { 5 } \right) - \left( 7 - 3 x ^ { 5 } + 8 x ^ { 6 } + 9 x ^ { 4 } \right)$$

Find the sum or difference.
- $$\left( 5 x ^ { 4 } + 3 x ^ { 6 } - 5 + 7 x ^ { 5 } \right) - \left( 7 - 3 x ^ { 5 } + 8 x ^ { 6 } + 9 x ^ { 4 } \right)$$

A) $- 5 x ^ { 6 } + 10 x ^ { 5 } - 4 x ^ { 4 } - 12$
B) $- 5 x ^ { 6 } + 4 x ^ { 5 } + 14 x ^ { 4 } + 2$
C) $11 x ^ { 6 } + 4 x ^ { 5 } + 14 x ^ { 4 } - 12$
D) $11 x ^ { 6 } + 4 x ^ { 5 } + 14 x ^ { 4 } + 2$

Correct Answer:

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