I have a conic equation

$\displaystyle 36y^2+504y-4x^2+48x+1476=0$

Which I am required to write in one of the following formats:

$\displaystyle \frac{x^2}{a^2}+\frac{y^2}{b^2}=1$

$\displaystyle \frac{x^2}{a^2}-\frac{y^2}{b^2}=1$

$\displaystyle \frac{y^2}{a^2}-\frac{x^2}{b^2}=1$

$\displaystyle y=ax^2$

$\displaystyle y=ay^2$

I've been looking online for a guide on how to do this, but with little success so far. Perhaps any of you can help. Thanks :)