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w in (-oo:+oo)
384 = (3/4)*w*w*w*w // - (3/4)*w*w*w*w
384-((3/4)*w*w*w*w) = 0
(-3/4)*w^4+384 = 0
-3/4*w^4 = -384 // : -3/4
w^4 = 512
w^4 = 512 // ^ 1/4
abs(w) = 4*2^(1/4)
w = 4*2^(1/4) or w = -(4*2^(1/4))
w in { 4*2^(1/4), -(4*2^(1/4)) }
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