（1）原式=1+2

3

+2-

3

=(1+2)+(2

3

-

3

)

=3+

3

；

（2）原式=3

2

-

3

2

2

-(1+

2

)+1+|1-

2

|

=3

2

-

3

2

2

-1-

2

+1+

2

-1

=

3

2

2

-1．