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Y in (-oo:+oo)
Y = -7.6154*(-7/8)-7 // + -7.6154*(-7/8)-7
Y-(-7.6154*(-7/8))+7 = 0
Y-6.663475+7 = 0
Y+0.336525 = 0 // - 0.336525
Y = -0.336525
Y = -0.336525
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