To simplify the expression, we first combine like terms:
(5x^2 - 4x - 4) + (8x^2 - 6x + 1) - (-4x^2 + 5x + 2)
= 5x^2 - 4x - 4 + 8x^2 - 6x + 1 + 4x^2 - 5x - 2
= (5x^2 + 8x^2 + 4x^2) + (-4x - 6x - 5x) + (-4 + 1 - 2)
= 17x^2 - 15x - 5
Therefore, the simplified expression is 17x^2 - 15x - 5.
(5x^2-4x-4)+(8x^2-6x+1)-(-4x^2+5x+2)
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