7. Let $P(x)=x^{5}-x^{2}+1$ have five roots $r_{1}$,
$$
\begin{array}{l}
r_{2}, \cdots, r_{5}, Q(x)=x^{2}+1 \text {. Then } \\
\quad Q\left(r_{1}\right) Q\left(r_{2}\right) Q\left(r_{3}\right) Q\left(r_{4}\right) Q\left(r_{5}\right) \\
\quad=
\end{array}
$$