It seems like you've uploaded an image of a mathematical exercise. Let me extract the content and help you solve it.

The image contains several expressions under the title "Izračunati" (meaning "Calculate" in Serbian). Here are the questions I see, roughly translated and extracted:

1. $0.5^{-1} + 0.25^{-2} + 0.125^{-3} + 0.0625^{-4}$
2. $1 - 1^{-2} + 2^{-3} + 3^{-4} + (-1)^{-1} + (-2)^{-2} + (-3)^{-3}$
3. $0.25^{-2} + 1.75^{-3} + 2.75^{-2} + 1.25^{-3}$
4. $0.1^{-2} - (0.40)^{-1}$

Would you like to start solving these one by one, or focus on a particular expression? Let me know how you'd like to proceed!