Здравствуйте найти производную f(x)

1. 2* 6*cos6x=12cos6x

2. -5(sin(8-4x))*(8-4x)'=20(8-4x))

3. 10*(2x-7)*(2x-7)'=20(2x-7)

4. 9/(2√(9x+4))=4.5/(9x+4)

5. 1.5*(1/(8cos²(x/8))=0.1875/cos²(x/8)

6. 2*5e²ˣ=10e²ˣ

7. 4*2/(√(1-4x²)=8/(√(1-4x²)

8. 6*16ˣ*㏑16