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1*x^4+0.2*x^3-(1*x)+0*x^2-0.2 = 0
1*x^4-(4*x^3)+6*x^2-(4*x)+1 = 0
128*x^3+192*x^2-(192*x)-128 = 0
128*x^3+192*x^2+192*x+128 = 0
x+y-3;x-y-2
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