2根号3/3+根号3+根号12-(根号3+1)^2+4根号3/4÷根号5又1/3
=2根号3/3+根号3+2根号3-3-2根号3-1+4根号3/4÷16/3
=2根号3/3+根号3-4+1.5
=5/3根号3-2.5