题目内容

设$
f(x)=\left\{\begin{array}{ll}
x^2, & x < 1 \\
x+3, & x \geq 1
\end{array}, \quad g(x)= \begin{cases}2-x, & x \leq 0 \\
2 x, & x>0\end{cases}\right.
$,则 $f(g(-2))=$ $\_\_\_\_$