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n in (-oo:+oo)
n^3 = 343/1.728 // - 343/1.728
n^3-(343/1.728) = 0
n^3-198.49537037 = 0
1*n^3 = 198.49537037 // : 1
n^3 = 198.49537037
n^3 = 198.49537037 // ^ 1/3
n = 198.49537037^(1/3)
n = 198.49537037^(1/3)
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