Analyze the provided image and extract all mathematical expressions and textual content.

Mathematical Expressions:

The image contains fragmented mathematical expressions. Partially visible elements include:

• A large number '3' followed by a '.' and possibly another digit or symbol.
• An equals sign '='.
• The number '8'.
• A large number '1' or symbol that appears to be part of a calculation.
• The letters 'cm' followed by a dot.
• The number '8' again.
• A cursive character or symbol that could be 'кг' or part of a larger word/variable.

Textual Content:

The image also contains Cyrillic text:

• The word 'прямы' is clearly visible. The full word is likely 'прямые', which translates to 'straight' or 'lines' in English.

Note: Due to the fragmented nature of the image, a complete and precise interpretation of all mathematical expressions is not possible.