m+2分之㎡- m-6加上㎡-m分之√㎡-2m+1
=m+㎡/2- m-6+㎡-√㎡/m-2m+1 因为m>0,所以√㎡=m
=m+㎡/2- m-6+㎡-m/m-2m+1
=m+㎡/2- m-6+㎡-1-2m+1
=㎡/2+㎡+m- m-2m-6-1+1
=3㎡/2-2m-6
=3(1/2+√3)²/2-2(1/2+√3)-6
=3(1/4+√3+3)/2-2(1/2+√3)-6
=(3/4+3√3+9)/2-(1+2√3)-6
=3/8+3√3/2+9/2-1-2√3-6
=3/8+9/2-1-6+3√3/2-2√3
=3/8+36/8-56/8+3√3/2-4√3/2
=-17/8-√3/2