[m]\frac{sin(55^{o}+5^{o})}{cos(65^{o}-5^{o})}\cdot \sqrt{3}=\frac{sin60^{o}}{cos60^{o}}\cdot \sqrt{3}=tg60^{o}\cdot \sqrt{3}=\sqrt{3}\cdot \sqrt{3}=3[/m]
