15, \(\frac{2}{(x+1)^{2}} + \frac{2x}{(x+1)^{2}}\) 6, \(\frac{4x}{2x-1} + \frac{2}{2x-1} - \frac{4}{2x-1}\) 7, \(\frac{2}{x-3} + \frac{3}{(x-1)(x-3)} + \frac{5}{x - 3}\) 8, \(\frac{5x^{2}}{x^{2}-4} + \frac{3}{x-2} - \frac{2}{x+2}\) 9, \(\frac{4}{x-1} + \frac{5}{x^{2}-1} + \frac{6}{x+1}\) 10, \(\frac{x^{2}}{x^{2}+2x+1} + \frac{x}{x^{2}+2x+1}\)

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15, \(\frac{2}{(x+1)^{2}} + \frac{2x}{(x+1)^{2}}\)
6, \(\frac{4x}{2x-1} + \frac{2}{2x-1} - \frac{4}{2x-1}\)
7, \(\frac{2}{x-3} + \frac{3}{(x-1)(x-3)} + \frac{5}{x - 3}\)
8, \(\frac{5x^{2}}{x^{2}-4} + \frac{3}{x-2} - \frac{2}{x+2}\)
9, \(\frac{4}{x-1} + \frac{5}{x^{2}-1} + \frac{6}{x+1}\)
10, \(\frac{x^{2}}{x^{2}+2x+1} + \frac{x}{x^{2}+2x+1}\)