计算或化简:
(1) - 2 2 + ( π - 2017 ) 0 - 2 sin 60 ° + | 1 - 3 | ;
(2) a ( 3 - 2 a ) + 2 ( a + 1 ) ( a - 1 ) .
计算: - | - 1 | + 12 ⋅ cos 30 ∘ - - 1 2 - 2 + ( π - 3 . 14 ) .
计算: | - 2 | + 9 × ∣ 1 2 - 1 - 4 × 1 2 - ( π - 1 ) 0 .
先化简,再求值: a 2 - 3 a a 2 + a ÷ a - 3 a 2 - 1 ⋅ a + 1 a - 1 ,其中a=2016.
计算: ( - 1 ) 2016 + 2 sin 60 ∘ - | - 3 | + π 0 .
解不等式 x + 1 2 ⩾ 3 ( x - 1 ) - 4 .