A system of equations:

$$\begin{eqnarray*} u\cos {(}\pi u^{3}{)}+v+1 &=&x \\ u+v^{2}\cos {(}\pi v{)}+1 &=&y \end{eqnarray*}$$

                \begin{eqnarray*}
                u\cos {(}\pi u^{3}{)}+v+1 &=&x \\
                u+v^{2}\cos {(}\pi v{)}+1 &=&y
                \end{eqnarray*}