cos(1/5) cos(2/5) cos(3/5) cos(4/5) cos(1) cos(6/5) cos(7/5)
-------- + -------- + -------- + -------- + ------ + -------- + --------
3 15 35 63 99 143 195
$$\frac{\cos{\left(\frac{7}{5} \right)}}{195} + \frac{\cos{\left(\frac{6}{5} \right)}}{143} + \frac{\cos{\left(1 \right)}}{99} + \frac{\cos{\left(\frac{4}{5} \right)}}{63} + \frac{\cos{\left(\frac{3}{5} \right)}}{35} + \frac{\cos{\left(\frac{2}{5} \right)}}{15} + \frac{\cos{\left(\frac{1}{5} \right)}}{3}$$
cos(1/5)/3 + cos(2/5)/15 + cos(3/5)/35 + cos(4/5)/63 + cos(1)/99 + cos(6/5)/143 + cos(7/5)/195