Find \(\int \left( 6 x ^ { 2 } - \frac { 5 } { \sqrt { x } } \right) \mathrm { d } x\)
6
The gradient of a curve is given by
$$\frac { \mathrm { d } y } { \mathrm {~d} x } = 6 x ^ { 2 } - \frac { 5 } { \sqrt { x } }$$
The curve passes through the point \(( 4,90 )\).
Find the equation of the curve.