计算 (1) - 1 4 + 16 ÷ ( - 2 ) 3 × | - 3 - 1 |
(2) 2 1 2 - ( 7 9 - 11 12 + 1 6 ) × 36 .
计算:.
计算:
(1)计算:|﹣|+(2014﹣)0﹣3tan30°; (2).先化简,再求值:,其中是2x2-2x-7=0的根.
(1)计算:;(2)化简: