Analyze the provided image and extract mathematical expressions and calculations.

The image contains mathematical expressions and a graph. The text above the graph seems to be a title or label, reading "Работа над ошибками" (Work on mistakes).

The graph shows a Cartesian coordinate system with the x and y axes. There are points and lines drawn on the graph. Labels like 'x' and 'y' are present, along with numerical values on the axes (0, 1, 4). A point labeled "(0, 2)" is also visible.

Below the graph, there are several mathematical expressions and integral calculations:

• An integral expression: ∫¹₀ qq x-4 / √x -2 dx
• A substitution section: √x = t, x = t², dx = 2t dt
• Another integral expression, likely a result of the substitution: ∫¹₀ t²-4 / t+2 ⋅ 2t dt

There is also an equals sign at the bottom left, suggesting a continuation of a calculation or a result.