Talk:Sums of powers

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I have found these

Latest comment: 30 days ago1 comment1 person in discussion

(4x^{7}+108y^{7})^{3}+(4x^{7}-108y^{7})^{3}=(2x^{3})^{7}+(6xy^{2})^{7}

above is outcome of the following formula

(4^{n}x^{6n+1}+108^{n}y^{6n+1})^{3}+(4^{n}x^{6n+1}-108^{n}y^{6n+1})^{3}=(2x^{3})^{6n+1}+(6xy^{2})^{6n+1}