اگر $f(x) = \left\{ {\begin{array}{*{20}{c}}
{ - x + 3}\\
5
\end{array}} \right.\,\,\,\,\,\,\,\begin{array}{*{20}{c}}
{x \lt 0}\\
{x \ge 0}
\end{array}$ و $g(x) = \left\{ {\begin{array}{*{20}{c}}
{2x - 1}\\
{ - x}
\end{array}\,\,\,\,\,\,\,\,\begin{array}{*{20}{c}}
{x \ge 0}\\
{x \lt 0}
\end{array}} \right.$ ، آنگاه $f( - 7) + g(11)$ کدام است؟