Rút gọn các biểu thức sau
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P = \(\frac{x + 1}{x - 1}\left[ (4x^2 - 1)\left( \frac{1}{2x - 1} - \frac{1}{2x + 1} \right) - 5 \right] \)
Q = \(\frac{4x - 6}{5x^2 - x} + \frac{25x^2 - 10x + 1}{27 - 8x^3} \);
A = \(\frac{2x + 10}{(x + 5)^3} : \frac{(x - 3)}{x^2 - 9} \);
B = \(\frac{4x^2 - 1}{16x^2 - 1} + \frac{1}{2x - 1} + \frac{1}{1 - 4x^2}\);
C = \(\left( \frac{x + y}{xy}, \frac{2}{x} \right) \frac{x^3}{y^3}\)
7x - 1, 4x - 1.
P = \(\frac{x + 1}{x - 1}\left[ (4x^2 - 1)\left( \frac{1}{2x - 1} - \frac{1}{2x + 1} \right) - 5 \right] \)
Q = \(\frac{4x - 6}{5x^2 - x} + \frac{25x^2 - 10x + 1}{27 - 8x^3} \);
A = \(\frac{2x + 10}{(x + 5)^3} : \frac{(x - 3)}{x^2 - 9} \);
B = \(\frac{4x^2 - 1}{16x^2 - 1} + \frac{1}{2x - 1} + \frac{1}{1 - 4x^2}\);
C = \(\left( \frac{x + y}{xy}, \frac{2}{x} \right) \frac{x^3}{y^3}\)
7x - 1, 4x - 1.