Let $(\lambda, 2,1)$ be a point on the plane which passes through the point $(4,-2,2)$. If the plane is perpendicular to the line joining the points ( $-2-- 21,29)$ and $(-1,-16,23)$, then $\left(\frac{\lambda}{11}\right)^2-\frac{4 \lambda}{11}-4$ is equal to
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