Calculate the derivative of f(x)=e−x2f(x) = e^{-x^2}f(x)=e−x2.
−2xe−x2-2x e^{-x^2}−2xe−x2
e−x2e^{-x^2}e−x2
−x2e−x2-x^2 e^{-x^2}−x2e−x2
−2xe−x-2x e^{-x}−2xe−x