Find the derivative of f(x)=7x4−3x2+5x−9f(x) = 7x^4 - 3x^2 + 5x - 9f(x)=7x4−3x2+5x−9.
28x3−6x+528x^3 - 6x + 528x3−6x+5
28x3−6x28x^3 - 6x28x3−6x
28x4−6x2+528x^4 - 6x^2 + 528x4−6x2+5
7x3−3x+57x^3 - 3x + 57x3−3x+5