5cos260°+4sec30°−tan245°sin230°+cos230°=

$= \frac{5 {(\frac{1}{2})}^{2} + 4 {(\frac{2}{\sqrt{3}})}^{2} - {(1)}^{2}}{{(\frac{1}{2})}^{2} + {(\frac{\sqrt{3}}{2})}^{2}}$

$= \frac{15 + 64 - 12}{\frac{12}{\frac{4}{4}}} = \frac{67}{12}$

$\frac{5 \cos^{2} 60 ° + 4 \sec 30 ° - \tan^{2} 45 °}{\sin^{2} 30 ° + \cos^{2} 30 °} =$