Multiply. \[ (2 x-4)\left(5 x^{2}+7 x-1\right) \] Simplify your answer.

Step 1 ：\(=(2x - 4) \times (5x^2) + (2x - 4) \times (7x) + (2x - 4) \times (-1)\)

Step 2 ：\(=10x^3 - 20x^2 + 14x^2 - 28x - 2x + 4\)

Step 3 ：\(\boxed{=10x^3 - 6x^2 - 30x + 4}\)