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w in (-oo:+oo)
-3*w-(1/2) = (5/2)*w-(1/3) // - (5/2)*w-(1/3)
1/3-3*w-((5/2)*w)-(1/2) = 0
(-5/2)*w-3*w-1/2+1/3 = 0
-11/2*w-1/6 = 0 // + 1/6
-11/2*w = 1/6 // : -11/2
w = 1/6/(-11/2)
w = -1/33
w = -1/33
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