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2*a-(4*a)-(a*((5*b)/6))+a*((5*b)/4)+2 = 0
2*a-4*a+(-5/6)*a*b+a*((5*b)/4)+2 = 0
5/12*a*b-2*a+2 = 0
x naleu017Cy do R
x in (-oo:+oo)
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