If the image of a quadratic function passes through the point (1,0) and the coefficient of the quadratic term of the analytic expression of the function is 1, then the analytic expression of the quadratic function is? (write one)

If the image of a quadratic function passes through the point (1,0) and the coefficient of the quadratic term of the analytic expression of the function is 1, then the analytic expression of the quadratic function is? (write one)

y=x^2-1
··