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x in (-oo:+oo)
W-(1/w)+1+3 = w-(2/w)+2 // - w-(2/w)+2
W-w-(1/w)+2/w-2+1+3 = 0
W-w-w^-1+2/w-2+1+3 = 0
W-w+w^-1+2 = 0
x naleu017Cy do R
x in (-oo:+oo)
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