根号6(根号1/8-根号6)-2根号48
=√6(1/4√2-√6)-8√3
=1/4√12-6-8√3
=1/2√3-6-8√3
=-6-15/2√3

(-1/2)-¹+（5-3）º+根号[（-根号5）²]-|根号5-2|
=-2+1+√5-√5+2
=1