x/x-3 - 10/x+3=18/(x-3)(x+3)
X-10/x-3+x+3=18/(x-3)(x+3)
18x-54+18x+54=x-10(x-3)(x+3)
36x=x-10(x^2+3x-3x-9)
36x=x^3+3x^2-3x^2-9x-10x^2-30x+30x+90
36x=x^3+51x-10x^2+90
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x/x-3 - 10/x+3=18/(x-3)(x+3)
X-10/x-3+x+3=18/(x-3)(x+3)
18x-54+18x+54=x-10(x-3)(x+3)
36x=x-10(x^2+3x-3x-9)
36x=x^3+3x^2-3x^2-9x-10x^2-30x+30x+90
36x=x^3+51x-10x^2+90