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x in (-oo:+oo)
-(x^10*((16*x^13)/(-2)))-20*x^16 = 0
8*x^23-20*x^16 = 0
8*x^23-20*x^16 = 0
4*x^16*(2*x^7-5) = 0
2*x^7 = 5 // : 2
x^7 = 5/2
x^7 = 5/2 // ^ 1/7
x = (5/2)^(1/7)
4*x^16 = 0
4*x^16 = 0 // : 4
x^16 = 0
x = 0
x in { (5/2)^(1/7), 0 }
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