Geometry Level 4

Let $$ABCD$$ is a cyclic quadrilateral with $$BD$$ parallel to the tangent to the circle at $$A$$ with $$AB=10$$.

Let $$E$$ be the intersection of the tangent from $$B$$ and $$AC$$. Also, $$F=CD \cap AB$$.

Find $$\dfrac{8 \times EB^2\times FB\times AC}{EC \times FC \times FD}$$.

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