1
-----------
________
/ 2
\/ 1 + t
$$\frac{1}{\sqrt{t^{2} + 1}}$$
-t
-----------
3/2
/ 2\
\1 + t /
$$- \frac{t}{\left(t^{2} + 1\right)^{\frac{3}{2}}}$$
2
3*t
-1 + ------
2
1 + t
-----------
3/2
/ 2\
\1 + t /
$$\frac{\frac{3 t^{2}}{t^{2} + 1} - 1}{\left(t^{2} + 1\right)^{\frac{3}{2}}}$$