/ -log(1 + x) for And(x <= 1, x > -1) / -x
| | ----- for |x| < 1
| oo | 1 + x
|____ |
|\ ` | oo
< \ n n < ___
| \ (-1) *x | \ `
| / -------- otherwise | \ n n
| / n | / (-1) *x otherwise
|/___, | /__,
\n = 1 \n = 1
- ---------------------------------------- - ----------------------------
x x
$$- \frac{\begin{cases} - \frac{x}{x + 1} & \text{for}\: \left|{x}\right| < 1 \\\sum_{n=1}^{\infty} \left(-1\right)^{n} x^{n} & \text{otherwise} \end{cases}}{x} - \frac{\begin{cases} - \log{\left(x + 1 \right)} & \text{for}\: x \leq 1 \wedge x > -1 \\\sum_{n=1}^{\infty} \frac{\left(-1\right)^{n} x^{n}}{n} & \text{otherwise} \end{cases}}{x}$$
-Piecewise((-log(1 + x), (x <= 1)∧(x > -1)), (Sum((-1)^n*x^n/n, (n, 1, oo)), True))/x - Piecewise((-x/(1 + x), |x| < 1), (Sum((-1)^n*x^n, (n, 1, oo)), True))/x