(6√3 - 10)/2= ∏/3 + ∏/4= 2(√7 - 1) - √7/2 =

(6√3 - 10)/2= (6√3)/2-10/2= 3√3-5   π/3+π/4= 4π/12+3π/12= 7π/12   2(√7-1)-√7/2= 2√7-2-√7/2= (4√7)/2-2-√7/2= 3√7/2-2