The image you uploaded contains a set of exercises for calculating derivatives of various functions. I will break down the problems for you and assist in finding the solutions.

Let's go through each task in the image:

Задание 1 (Task 1)

Find the derivative of the following functions:

1. $f(x) = 5x - 4$
2. $f(x) = 4x^3$
3. $f(x) = 3x^2 - 8x$
4. $f(x) = x^6 - 5x$
5. $f(x) = 3x^2 + 8x - 10$

Задание 2 (Task 2)

Find the derivative of the following functions:

1. $f(x) = (x + 4)(5x - 4)$
2. $f(x) = (x - 3)(4x^3)$
3. $f(x) = (x^2 - 3)(2x^2 - 10x)$
4. $f(x) = (3x^3 + 2x)(x^6 - 4x)$
5. $f(x) = (2x^2 + 8x - 5)(3x^2 + 8x)$

Задание 3 (Task 3)

Find the derivative of the following functions:

1. $f(x) = \frac{5x - 4}{2x}$
2. $f(x) = \frac{4x}{8x - 9}$
3. $f(x) = 3x - 8 + 9x - 4x$
4. $f(x) = \sqrt{6x - 10}$
5. $f(x) = (x^2 - 3x)^2$

Would you like me to go through the solutions step-by-step for each one? Let me know which specific part you'd like to focus on!