(1)计算:|﹣|+(2014﹣)0﹣3tan30°;(2).先化简,再求值:,其中是2x2-2x-7=0的根.
计算:.
(8分)计算:.
(8分)计算
(1) (2)-1-〔1-(1-0.5×)〕×6(4) (5)(-+)×(-36) (6)