6-√(3/2)-√(2/3)
=6-1/2√6-1/3√6
=6-5/6√6,
√(0.39/0.013)=√30,
如果只有一题:
6-√(3/2)-√(2/3)+√30
=6-1/2√6-1/3√6+√30
=6-5/6√6+√30.