(3倍根号12-2倍根号1/3+根号48)除以2倍根号3 =(6倍根号3-2/3倍根号3+4倍根号3)*6分之根号3
=(6√3*√3-2/3√3*√3+4√3*√3)/6=(18-2+12)/6=28/6=14/3