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x in (-oo:+oo)
c = 54*d-((1/3)*b) // - 54*d-((1/3)*b)
(1/3)*b+c-(54*d) = 0
(1/3)*b+c-54*d = 0
1/3*b+c-54*d = 0
x naleu017Cy do R
x in (-oo:+oo)
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