原式=(2√3-4x√2/4)x(2x√3/3-4x√2/2)=(2√3-√2)x(2√3/3-2√2)=2√3x2√3/3-2√3x2√2-√2x2√3/3+√2x2√2)=4-4√6-2√6/3+4=8- 14√6/3
