I've seen this common parametiric represintation of the hyperboloid
https://en.wikipedia.org/wiki/Hyperboloid#Common_parametric_representation
But I can't realize what `s` and `d` are, and how to get `a`, `b`, `c`.
Could you explain and show by this example?
(x-3)^2/25 + (y+1)^2/9 - z^2/10 = x-5