Упростивыражение

\(\dfrac{x^{\frac{1}{6}}−1}{2x^{\frac{1}{6}}−6}−\dfrac{1}{x^{\frac{1}{6}}}+\dfrac{3x^{\frac{1}{6}}−x^{\frac{1}{3}}−6}{2x^{\frac{1}{3}}−6x^{\frac{1}{6}}}=\) [ ].