计算
(1)计算:2 ﹣ 2+(3 27 ﹣ 1 4 6 )÷ 6 ﹣3sin45°;
(2)解方程: x - 3 x - 2 +1= 3 2 - x .
计算: (1)2+3(2)5+-7 (3)++-+(4)+6a-3a2
计算: (1)(4)
计算(本小题4题,每题5分) (1)(2) (3)(4)