Solving:
13x³ - 26x⁵ - 39x⁷ ÷ 13x³
13x³ - 26x⁵- 39x⁷÷ 13×x³
13x³- 26x⁵- 3x⁷×x³
13x³- 26x⁵- 3x¹⁰
Factor out by x³
[tex]\red{\boxed{{x}^{3}(13 - 26 {x}^{2} - 2 {x}^{7} }}[/tex]
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