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7*t+x+y-(6*z)-9;5*t+2*x-y-(6*z)-6;3*x-(4*y)-(4*z)+1
{root[3][9000]}
3*x^3-(2*x^2)+5*x-6 = 0
3*x^3-(2*x^2)+5*x-6
3*x^-2
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