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8*x-((5/12)*x)-(4*y^3)-(2*y) = 0
8*x+(-5/12)*x-4*y^3-2*y = 0
91/12*x-4*y^3-2*y = 0 // + -4*y^3-2*y
91/12*x = -(-4*y^3-2*y) // : 91/12
x = (-(-4*y^3-2*y))/91/12
x = -12/91*(-4*y^3-2*y)
x = -12/91*(-4*y^3-2*y)
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