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20*x^2+14.5*x+0*x^3+2.5 = 0
x^2*y-20;2*x^2+4*x*y-48
(x-0.5)*(x+2)*(x-3) = 0
4*x^3-(4*x^2)-(2*x)+6 = 0
log(3)(ln(x))
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