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If a ,b ,c are non-zero real numbers, th...

If `a ,b ,c` are non-zero real numbers, then find the minimum value of the expression `(((a^4+ 3a^2+1)(b^4+5b^2+1)(c^4+7c^2+1))/(a^2b^2c^2))` which is not divisible by prime number.

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