Find ddx[x5−4x3+7]\frac{d}{dx}[x^5 - 4x^3 + 7]dxd[x5−4x3+7].
5x4−12x25x^4 - 12x^25x4−12x2
5x4−4x35x^4 - 4x^35x4−4x3
5x4−12x2+75x^4 - 12x^2 + 75x4−12x2+7
5x4−12x5x^4 - 12x5x4−12x