СРОЧНО!! помогите решить

1)

[tex]f(x) = {x}^{6} \\ f'(x) = 6x {}^{6 - 1} = 6 {x}^{5} [/tex]

2)

[tex]f(x) = 5 \cos(x) \\ f'(x) = 5 \times ( - \sin(x) ) = - 5 \sin(x) [/tex]

3)

[tex]g'(x) = 3 {x}^{ - 2} \\ g(x) = - 2 \times 3 {x}^{ - 2- 1} = - 6 {x}^{ - 3} = - \frac{6}{ {x}^{3} } [/tex]

4)

[tex]g(x) = \ctg(x) \\ g'(x) = - \frac{1}{ \sin {}^{2} (x) } [/tex]