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t^2-5*t+6/t-3 = 2*t-(4/b) // - 2*t-(4/b)
4/b+t^2-5*t-(2*t)+6/t-3 = 0
4/b+t^2-5*t-2*t+6/t-3 = 0
4*b^-1+t^2-7*t+6*t^-1-3 = 0
x naleu017Cy do R
x in (-oo:+oo)
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