先化简,再求值: x x - 3 ⋅ x 2 - 9 - 3 x ,其中x=2.
+|-2|++(-1)2011
计算:(共24分每题4分) (1)(2)[-2 2+(-2)3 ]-(-2)×(-3) (3)()() (4) (5)—14+〔1-(1-0.5×2)〕÷ (6)[(-3)2-22-(-5)2]××(-2)4
(本大题共4分)计算;
计算:.