[(根号12-根号(4/3)]-2[(根号(1/8)-根号(1/2)-根号18] =(2根号3-2/3根号3)-2(1/4根号2-1/2根号2-3根号2) =2/3根号3-2(-13/4根号2) =2/3根号3+13/2根号2
