Sure! Here are a few examples of quadratic equations:

1) y = x^2 + 2x + 1

2) y = -3x^2 + 5x - 2

3) y = 4x^2 - 6x + 2

4) y = 2x^2 + 3x + 1

5) y = -x^2 + 4x - 3

These equations are all in the form of y = ax^2 + bx + c, where a, b, and c are constants.