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已知 \( f\left(x\right)=\left\{\begin{array}{c}0, x>0\\ -e, x=0\\ {x}^{2}+1,x<0\end{array}\right.\),则 \( f\left(f\right(f\left(\pi \right)\left)\right)\) 的值为___.
参考答案:\( {e}^{2}+1\)
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