计算: ( 1 2 ) - 2 + | 3 - 2 | - 2 cos 30 ° + - 27 3 .
(1)计算:3(–π)0– + (–1)2011
计算:(1)2×(-5)+23-3÷.
(2)先化简,再求值: – ,其中x = –3