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w in (-oo:+oo)
(w^1)/2+6 = (5^1)/4 // - (5^1)/4
(w^1)/2-((5^1)/4)+6 = 0
w/2-5/4+6 = 0
1/2*w+19/4 = 0 // - 19/4
1/2*w = -19/4 // : 1/2
w = -19/4/1/2
w = -19/2
w = -19/2
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