-1
---------------
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2*\/ x *(1 + x) 1 2
- + -----
x 1 + x
---------------
___
4*\/ x *(1 + x) / 1 3 1 \
-|-------- + ---- + -----------|
| 2 2 2*x*(1 + x)|
\(1 + x) 8*x /
---------------------------------
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\/ x *(1 + x)