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16*x^6-(x^3*((10*x^4)/2)) = 0
16*x^6-5*x^7 = 0
16*x^6-5*x^7 = 0
x^6*(16-5*x) = 0
16-5*x = 0 // - 16
-5*x = -16 // : -5
x = -16/(-5)
x = 16/5
x^6 = 0
1*x^6 = 0 // : 1
x^6 = 0
x = 0
x in { 16/5, 0 }
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