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w in (-oo:+oo)
-4/3 = (-2/5)*w-(3/2) // - (-2/5)*w-(3/2)
3/2-((-2/5)*w)-4/3 = 0
(2/5)*w-4/3+3/2 = 0
2/5*w+1/6 = 0 // - 1/6
2/5*w = -1/6 // : 2/5
w = -1/6/2/5
w = -5/12
w = -5/12
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