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y in (-oo:+oo)
y+9 = (-2/9)*(3-(4/9)) // - (-2/9)*(3-(4/9))
y-((-2/9)*(3-(4/9)))+9 = 0
y+(2/9)*(3-4/9)+9 = 0
y+775/81 = 0 // - 775/81
y = -775/81
y = -775/81
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