\( \frac { - 3 x ^ { 2 } } { } + 4 x + 9 + ( + 8 x ^ { 2 } + 8 x + 4 ) \)

To simplify the expression, let's first combine like terms. The expression can be rewritten as: \[ \frac{-3x^2}{1} + 4x + 9 + 8x^2 + 8x + 4 \] Now, group the terms: 1. Combine the quadratic terms: \(-3x^2 + 8x^2 = 5x^2\) 2. Combine the linear terms: \(4x + 8x = 12x\) 3. Combine the constant terms: \(9 + 4 = 13\) Putting it all together, we have: \[ 5x^2 + 12x + 13 \] So, the simplified expression is: \[ 5x^2 + 12x + 13 \]