Which of the following is not a quadratic equation:

1
3(x-1)2 = 2x2 - 5x + 3
2
5x - x2 = 2x2 + 3
3
\((\sqrt{3} x-\sqrt{2})^2-x^2=2 x^2+2 x\)
4
3(x - 1)2 = 5x2 - 2x + 1

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