Find the Sum or Difference $$\left( 4 x ^ { 2 } + 3 x - 1 \right) \left( x ^ { 2 } - 3 x - 3 \right)$$

Find the sum or difference.
- $$\left( 4 x ^ { 2 } + 3 x - 1 \right) \left( x ^ { 2 } - 3 x - 3 \right)$$

A) $4 x ^ { 4 } - 9 x ^ { 3 } - 22 x ^ { 2 } - 6 x + 3$
B) $4 x ^ { 4 } - 12 x ^ { 3 } - 21 x ^ { 2 } - 6 x + 3$
C) $4 x ^ { 4 } - 9 x ^ { 3 } - 21 x ^ { 2 } - 6 x + 3$
D) $4 x ^ { 4 } - 12 x ^ { 3 } - 22 x ^ { 2 } - 6 x + 3$

Correct Answer:

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