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10*x^7-(x^3*((12*x^5)/2)) = 0
10*x^7-6*x^8 = 0
10*x^7-6*x^8 = 0
2*x^7*(5-3*x) = 0
5-3*x = 0 // - 5
-3*x = -5 // : -3
x = -5/(-3)
x = 5/3
2*x^7 = 0
2*x^7 = 0 // : 2
x^7 = 0
x = 0
x in { 5/3, 0 }
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