\( y=\left(x^{2}-4 x+1\right)^{5} \)
\(y'' = 20(x^{2}-4x+1)^{3}(2x-4)^{2} + 40(x^{2}-4x+1)^{4}\)
Step 1 :\(y=(x^{2}-4x+1)^{5}\)
Step 2 :\(y' = 5(x^{2}-4x+1)^{4}(2x-4)\)
Step 3 :\(y'' = 20(x^{2}-4x+1)^{3}(2x-4)^{2} + 40(x^{2}-4x+1)^{4}\)