=(a-1)^2/a-1 -(√a^2-2a+1)/(a^2-a)
=a-1-(a-1)/a(a-1)
=a-1-1/a
=a^2-a-1/a
原式=[1/4+（√3）+3-1/2-（√3）-1]/（1/2）+√3
=（7+14√3）/22