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MATHCOUNTS State Sprint 2025 (Problem 30)

If xx and yy are real numbers such that (4−x)(4+y)=2(4-x)(4+y)=2 and (4+x)(4−y)=3(4+x)(4-y)=3, what is the value of (x2−1)(y2−1)(x^2-1)(y^2-1)? Express your answer as a common fraction.