计算:an﹣5(an+1b3m﹣2)2+(an﹣1bm﹣2)3(﹣b3m+2)
计算: (1)×÷1 (2)
计算: (1) (2)
计算: (1) (2).
(1)计算: (2)解方程:
(1) (2)2﹣4÷×(﹣) (3)﹣22+4×(﹣3)2+6. (4)