Beyond the Basics

77. $\frac{1}{{(x - 1)}^{2}} - \frac{1}{{(x + 1)}^{2}}$ $\frac{1}{{(x - 1)}^{2}} - \frac{1}{{(x + 1)}^{2}}$
79. $\frac{- 1}{2 (x - 1)} + \frac{x - 1}{2 (x^{2} + 1)} + \frac{1}{{(x - 1)}^{2}}$ $\frac{- 1}{2 (x - 1)} + \frac{x - 1}{2 (x^{2} + 1)} + \frac{1}{{(x - 1)}^{2}}$
81. $\frac{- 4}{x + 2} - \frac{8}{{(x + 2)}^{2}} - \frac{1}{{(x + 1)}^{2}} + \frac{5}{x + 1}$ $\frac{- 4}{x + 2} - \frac{8}{{(x + 2)}^{2}} - \frac{1}{{(x + 1)}^{2}} + \frac{5}{x + 1}$
83. $1 + \frac{2}{x + 1} - \frac{1}{x + 2}$ $1 + \frac{2}{x + 1} - \frac{1}{x + 2}$

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Table of Contents for Beyond the Basics