Spoètìte køivkový integrál 
$$
\int \!xy{d \varphi}={ \frac {1} {6} }
{a}^{3}
\left 
(\left ({\frac {{e}^{2\,T}}{2}}+{
\frac {{e}^{-2\,T}}{2}}\right )^{3/
2}-1\right )
\quad ,
$$
kde køivka $\varphi $ je definována 
$$
\varphi (t)=
\Left( 
{\frac {1} {2} }
{a\left ({e}^{t}+{e}^{-t}\right )},
{\frac {1} {2} }
{a\left ({e}^{t}-{e}^{-t}\right )} 
\Right )
\quad , t \in [0,T] \guad .
$$
