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What is the second derivative of f(x) = 4x^2+2x+1?

If you get it right, you get....the satisfaction of having solved an advanced math problem!

I'll solve it for what I THINK is it.
f(2) = 2^2 = 4*4 = 16 .
f(2) = 2*2 = 4 + 16 = 20 + 1 = 21.

f(2) = 21
{(2, 21)}