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1) [tex]4( x^{3} -1)(9 x^{3} +5)-(6 x^{3} -1)^{2}
[/tex]
2) [tex] (x^{4} -1) ^{2} -( x^{4} +4)-( x^{4} -6)[/tex]
1) [tex]4( x^{3} -1)(9 x^{3} +5)-(6 x^{3} -1)^{2}
[/tex]
2) [tex] (x^{4} -1) ^{2} -( x^{4} +4)-( x^{4} -6)[/tex]
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1)
=20x³-36x³-20+6x³+6x³-1=-4x³-21
2)