已知:
(1)计算: 13√27−43sin60°+|2−√3|+√43
(2)解分式方程: x−1x−2+2=32−x
先化简,再求值: (x−1x−x−2x+1)÷2x2−xx2+2x+1,其中 x满足 x2−2x−2=0.
计算: (π−2)0+4cos30°−√12−(−12)−2.
化简: (1+2a−1)÷a2+2a+1a−1.
计算: π0+√16+(12)−1−|−4|.