(1)| 3 ?2|+20090?(? 1 3 )?1+3tan30°=2- 3 +1+3+ 3 =6;(2) 1 2x ? 1 x+y (x2?y2+ x+y 2x )= 1 2x -(x-y)- 1 2x =-x+y,把x= 2 ,y=3代入,原式=- 2 +3.