Is there a general solution for solving a differential equation that takes the form $y''+ p(t)y' + q(t)y = g(t)$

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I have to solve the following equation. I have a textbook but I can't seem to find anything regarding second order differential equations with non-constant coefficients. Is there a general solution? For example, the equation I have to solve is $$y''-\frac{2t}{9-t^2}y'+ \frac{n^2+n}{9-t^2}y = 0$$