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Вычисли:

\((sin 54^{\circ}cos72^{\circ}+cos54^{\circ}sin72^{\circ})^2 + (cos18^{\circ}cos108^{\circ}-sin18^{\circ}sin108^{\circ})^2 = \) [ ];

\(\dfrac{tg{\dfrac{\pi}{10}}+tg{\dfrac{2\pi}{5}}}{tg(\dfrac{\pi}{10}+\dfrac{2\pi}{5})} + \dfrac{tg{\dfrac{\pi}{10}}-tg{\dfrac{2\pi}{5}}}{tg(\dfrac{\pi}{10}-\dfrac{2\pi}{5})} = \) [ ].