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(2*x^10)/2+7*x^6 = 0
x^10+7*x^6 = 0
x^6*(x^4+7) = 0
1*x^4 = -7 // : 1
x^4 = -7
x^6 = 0
1*x^6 = 0 // : 1
x^6 = 0
x = 0
x = 0
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