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