DSolve[Derivative[1][y][x] == (x*(27*E^((9*x^2)/2) + 27*E^(3*x^2)*y[x] + 27*E^((9*x^2)/2)*y[x] + 18*E^(3*x^2)*y[x]^2 + 9*E^((9*x^2)/2)*y[x]^2 + 27*y[x]^3 + 3*E^(3*x^2)*y[x]^3 + E^((9*x^2)/2)*y[x]^3))/(243*E^((3*x^2)/2)*y[x]),y[x],x]