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w in (-oo:+oo)
2*(4*w+2) = -52 // + 52
2*(4*w+2)+52 = 0
2*(4*w+2)+52 = 0
8*w+56 = 0
8*w+56 = 0
8*w+56 = 0 // - 56
8*w = -56 // : 8
w = -56/8
w = -7
w = -7
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