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(-3*x^11)/3-(3*x) = 0
(-3*x^11)/3-3*x = 0
-x^11-3*x = 0
-x*(x^10+3) = 0
1*x^10 = -3 // : 1
x^10 = -3
-x = 0
-1*x = 0 // : -1
x = 0
x = 0
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