-1
----------------
________
2 / 1
x * / 1 + --
/ 2
\/ x
$$- \frac{1}{x^{2} \sqrt{1 + \frac{1}{x^{2}}}}$$
1
2 - -----------
2 / 1 \
x *|1 + --|
| 2|
\ x /
----------------
________
3 / 1
x * / 1 + --
/ 2
\/ x
$$\frac{2 - \frac{1}{x^{2} \left(1 + \frac{1}{x^{2}}\right)}}{x^{3} \sqrt{1 + \frac{1}{x^{2}}}}$$
3 7
-6 - ------------ + -----------
2 2 / 1 \
4 / 1 \ x *|1 + --|
x *|1 + --| | 2|
| 2| \ x /
\ x /
-------------------------------
________
4 / 1
x * / 1 + --
/ 2
\/ x
$$\frac{1}{x^{4} \sqrt{1 + \frac{1}{x^{2}}}} \left(-6 + \frac{7}{x^{2} \left(1 + \frac{1}{x^{2}}\right)} - \frac{3}{x^{4} \left(1 + \frac{1}{x^{2}}\right)^{2}}\right)$$