Помогите срочно, пожалуйста ))

4.
$y = \sqrt{8x + 5}\\ y' = \frac{8}{2\times\sqrt{8x + 5}} = \frac{4}{\sqrt{8x + 5}}\\ y' = -\frac{4*8}{2*(8x + 5)^\frac{3}{2}} = -\frac{16}{(8x + 5)^\frac{3}{2}}$

5.
$y = -3\ln{3x}\\ y' = -\frac{3*3}{3x} = -\frac{3}{x} = -3x^{-1}\\ y'' = 3*x^{-2}\\ y''' = -6*x^{-3}$

6.
$y = \frac{5}{6}e^{-6x}\\ y' = -5e^{-6x}\\ y'' = 30*e^{-6x}\\ y''(0) = 30$