(a) If \(f(x + 2) = 6x^{2} + 5x - 8\), find \(f(5)\).

(b) Express \(\frac{7\sqrt{2} + 3\sqrt{3}}{4\sqrt{2} - 2\sqrt{3}}\) in the form \(p + q\sqrt{r}\), where p, q and r are rational numbers.