If \( p \lambda^{4}+q \lambda^{3}+r \lambda^{2}+s \lambda+t=\left|\begin{array}{ccc}\lambda^{2}+...

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If \( p \lambda^{4}+q \lambda^{3}+r \lambda^{2}+s \lambda+t=\left|\begin{array}{ccc}\lambda^{2}+3 \lambda & \lambda-1 & \lambda+3 \\ \lambda^{2}+1 & 2-\lambda & \lambda-3 \\ \lambda^{2}-3 & \lambda+4 & 3 \lambda\end{array}\right| \), then \( t \) is equal to
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