解方程: 1 x - 2 - 4 x 2 - 4 = 1 .
(本小题满分12分)(1) (2)
计算:-(cos30°-1) 0-82×0.1252.
(8分)计算:
(本题5分)计算:|-2|-(3-π)0+2 .
计算:.