-1
---------------
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2*\/ x *(1 + x)
$$- \frac{1}{2 \sqrt{x} \left(x + 1\right)}$$
1 2
- + -----
x 1 + x
---------------
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4*\/ x *(1 + x)
$$\frac{\frac{2}{x + 1} + \frac{1}{x}}{4 \sqrt{x} \left(x + 1\right)}$$
/ 1 3 1 \
-|-------- + ---- + -----------|
| 2 2 2*x*(1 + x)|
\(1 + x) 8*x /
---------------------------------
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\/ x *(1 + x)
$$- \frac{1}{\sqrt{x} \left(x + 1\right)} \left(\frac{1}{\left(x + 1\right)^{2}} + \frac{1}{2 x \left(x + 1\right)} + \frac{3}{8 x^{2}}\right)$$