把下列各式分解因式(每题4分,共16分)(1)(a-3)2+(3-a) (2)x2+16y2-8xy (3) x5-x3 (4)9m2-n2+3m-n
计算:.
计算:
计算:(﹣1)4﹣2tan60°++
(黄石)计算:.