The user wants me to analyze the image and extract mathematical expressions and calculations. I need to present these in a structured JSON format, adhering to the provided schema and specific formatting rules for mathematical notation (MathJax) and HTML.

Вычисления:

1. \( (650 - 500) + 300 = 150 + 300 = 450 \)
2. \( 620 - (80 - 100) = 620 - (-20) = 640 \)
3. \( (430 + 190) - 160 = 620 - 160 = 460 \)
4. \( (660 - 480) + 180 = 180 + 180 = 360 \)
5. \( 660 - 480 = 180 \)
6. \( 960 - (750 + 120) = 960 - 870 = 90 \)
7. \( 400 + (210 + 390) = 400 + 600 = 1000 \)
8. \( 1000 - (640 + 290) = 1000 - 930 = 70 \)
9. \( 430 + (140 - 70) = 430 + 70 = 500 \)