计算:
(1) ( - 2 ) 2 - ( 1 2 ) - 1 + 2017 0
(2) ( 1 + 4 x - 2 ) ÷ x + 2 x 2 - 4 x + 4 .
计算.(每题4分,共8分) (1) (2)
计算:(每小题4分,本题共16分) (1) (2) (3) (4)
计算:(1)-7-11-9+5 (2)×2+÷4
计算题.(每题4分,共8分) (1)计算:-()-2+(-1)0; (2)+ +.