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1*x^4-(2*x^3)+1*x^2+0*x+0 = 0
1*x^3-(1*x^2)-(1*x)+0 = 0
e^(7-(3*t))
e^(7-(2*t))
(0.4*s+1)*(0.9*s+1)*(9*s+1) = 0
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