f(x) = k  - f' (x)=0, f(x) = x - f' (x)=1, f(x) = ax +b - f' (x)=a, f(x) = u (x) + v (x) - f' (x)=u' (x)+ν' (x), f(x) = k * u (x) - f' (x)=k⋅u' (x), f(x)=sⅇn x - f^' (x)=cos⁡x, f(x)=ln ⁡x - f^' (x)=1/x,

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