(1)计算: ( 3 ) 2 − 2 − 1 × ( − 4 ) ;
(2)化简: ( m + 2 ) ( m − 2 ) − m 3 × 3 m .
,7分)计算:
. (2011山东滨州,19,6分)计算:
,6分)计算:
(2011 浙江湖州,17,6)计算: