Which of the equations below is a second order nonlinear differential equation? O A. B. 2 x²y - (1 - dx) ². e -x d²x x3 dy dx - = e2x - dy sin(x) = dx x - 5sin(2x)y ey d²y d²x = tan (x) -e³cos (x) y = x4 None of the Choices.

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