Помогите решить хоть часть образцов

2) f(x) = -9*1/3*x = -3x

3) f(x) = -8/x

5) f(x) = 0

6) f(x) = 14x - 12x+27x+3x-18x+5

7) f(x) = 2/cosx - sinx - cosx

8) f(x) = -1/sinx+5x

9) f(x) = cosx - 3/x - 4

10) f(x) = 10x(7x+15)+7x = x(70x+150+7x) = x(77x+150)

11) f(x) = 13(8+7x)+7(13x-8) = 104+91x+91x-56 = 182x+48

12) f(x) = (-sinx-1)6x+(cosx-x)6 = 6(-x*sinx - x+cosx - x) = 6(cosx-2x-x*sinx)

14) f(x) = [(8x-3x-1)*tgx - (2x-x-x)*1/cosx]/tgx = [tgx*cosx(8x-3x-1) - 2x+x+x]/cosx*tgx = [sinx*cosx(8x-3x-1)-2x+x+x]/sinx

15) f(x) = [9x*x - (3x-2)*1/2x]/(x) = (9x*x*2x-3x+2)/2xx = (18x-3x+2)/2xx = (15x+2)/2xx

17) f(x) = (15x+4x)/2x+2x+3