(本题共4小题,每题3分,满分12分)计算: (1); (2); (3); (4)×
计算:cos30°﹣+()﹣2.
计算:.
(1)计算:|1﹣|++(﹣2)0; (2)化简:(a2b﹣2ab2﹣b3)÷b﹣(a﹣b)2.
计算:
计算:−2cos30°+(−1)0−()−1.