$(a-3)^3 - {1\over(a-3)^3}$ ର ମୂଲ୍ୟ କଣ ,ଯଦି $a- {1\over a-3} = 5$ ?

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\((a-3)^3 - {1\over(a-3)^3}\) ର ମୂଲ୍ୟ କଣ ,ଯଦି \(a- {1\over a-3} = 5\) ?