1/x+4 -1/x-7=11/30 x is not equal to -4,1
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\begin{gathered}given \: expression \: is \\ (x-1)(x+1)(x^{2}+1)(x^{4}+1) \\ = ( {x}^{2}-1)( {x}^{2} + 1)( {x}^{4} + 1) \\ = ( {x}^{4} - 1)( {x}^{4} + 1) \\ = {x}^{8} - 1\end{gathered}
givenexpressionis
(x−1)(x+1)(x
2
+1)(x
4
+1)
=(x
2
−1)(x
2
+1)(x
4
+1)
=(x
4
−1)(x
4
+1)
=x
8
−1
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