Find the derivative of

Let f(x) =

By product rule,

= x⁵ (0 – 6 × (-9) x^-9-1) + (3 – 6x^-9)(5x⁴)

= x⁵ (54x^-10) + 15x⁴ – 30x^-5

∴ f’(x) = 24x^-5 + 15x⁴