9. A curve with equation \(y = \mathrm { f } ( x )\) passes through the point \(( 9,10 )\).
Given that
$$f ^ { \prime } ( x ) = 27 x ^ { 2 } - \frac { 21 x ^ { 3 } - 5 x } { 2 \sqrt { x } } \quad x > 0$$
find \(\mathrm { f } ( x )\), fully simplifying each term.