22. \( P = \frac{1}{\sqrt{x-1}-\sqrt{x}} + \frac{\sqrt{x^3}-x}{\sqrt{x}-1} \) 23. \( A = \left( \frac{1 - \sqrt{x}}{1 + x} \right) \cdot \left( \frac{\sqrt{x + 3} - \sqrt{x + 2}}{\sqrt{x - 2} + \sqrt{x + 6}} \right) \) 24. \( A = \frac{\sqrt{x + 1} \cdot (x - 2\sqrt{x} - 3)}{x - 1} \cdot \left( \frac{2}{\sqrt{x} + 1} \right) \) 25. \( A = \frac{\left( \frac{1}{\sqrt{x + 1}} - \frac{2\sqrt{x - 2}}{\sqrt{x} - \sqrt{x - 1}} \right)}{(x - 1)} \) 26. \( A = \left( \frac{2x + 1}{\sqrt{x^3} - 1} \right) \cdot \left( 1 - \frac{x + 4}{x + \sqrt{x + 1}} \right) \) 27. \( A = \frac{2\sqrt{a} - 9}{a - 5 + 6} \cdot \frac{2\sqrt{a} + 1}{\sqrt{a - 2} - 3\sqrt{a}} \) 28. \( A = \frac{(x - 5\sqrt{x}) - 1}{x - 25} \cdot \frac{25 - x}{\sqrt{x + 2\sqrt{x} - 15} + \sqrt{x + 5} - \sqrt{x - 3}} \) 29. \( A = \frac{(x - 3\sqrt{x}) - 1}{x - 9} \cdot \left( \frac{9 - x}{x + \sqrt{x - 6} \cdot 2 - \sqrt{x - 2}} \right) \)

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22. \( P = \frac{1}{\sqrt{x-1}-\sqrt{x}} + \frac{\sqrt{x^3}-x}{\sqrt{x}-1} \)

23. \( A = \left( \frac{1 - \sqrt{x}}{1 + x} \right) \cdot \left( \frac{\sqrt{x + 3} - \sqrt{x + 2}}{\sqrt{x - 2} + \sqrt{x + 6}} \right) \)

24. \( A = \frac{\sqrt{x + 1} \cdot (x - 2\sqrt{x} - 3)}{x - 1} \cdot \left( \frac{2}{\sqrt{x} + 1} \right) \)

25. \( A = \frac{\left( \frac{1}{\sqrt{x + 1}} - \frac{2\sqrt{x - 2}}{\sqrt{x} - \sqrt{x - 1}} \right)}{(x - 1)} \)

26. \( A = \left( \frac{2x + 1}{\sqrt{x^3} - 1} \right) \cdot \left( 1 - \frac{x + 4}{x + \sqrt{x + 1}} \right) \)

27. \( A = \frac{2\sqrt{a} - 9}{a - 5 + 6} \cdot \frac{2\sqrt{a} + 1}{\sqrt{a - 2} - 3\sqrt{a}} \)

28. \( A = \frac{(x - 5\sqrt{x}) - 1}{x - 25} \cdot \frac{25 - x}{\sqrt{x + 2\sqrt{x} - 15} + \sqrt{x + 5} - \sqrt{x - 3}} \)

29. \( A = \frac{(x - 3\sqrt{x}) - 1}{x - 9} \cdot \left( \frac{9 - x}{x + \sqrt{x - 6} \cdot 2 - \sqrt{x - 2}} \right) \)