dsolve(diff(y(x),x) = -8*x*(a-1)*(a+1)/(8-8*y(x)+2*x^4-8*a^2+4*x^2*y(x)^2+3*x^4*y(x)^2+2*y(x)^4+x^6-a^2*y(x)^6+a^8*x^6-4*a^6*x^6+6*a^4*x^6-2*a^2*y(x)^4-2*a^6*x^4+6*a^4*x^4-6*a^2*x^4-4*a^2*x^6+3*a^4*y(x)^4*x^2-3*a^6*y(x)^2*x^4+9*y(x)^2*a^4*x^4-9*y(x)^2*a^2*x^4-8*y(x)^2*a^2*x^2+4*a^4*y(x)^2*x^2-6*y(x)^4*a^2*x^2+y(x)^6+3*x^2*y(x)^4),y(x))