一解答题1计算:(1)(2)(2m2n2)2(3m1n3)32计算:4(2007双柏县)化简:6(2005江西)化简(x29)8(2005宜昌)计算:+3化简:5(2006襄阳)计算:7(2007北京)计算:9(2001吉林)计算:(1);(2)11计算:10(2001 常州)12计算:a113计算:(1)14计算:a2+16化简:17已知 ab=1,试求分式:的值18计算:,并指出 x 的取值范围15计算:(2)19(2010新疆)计算:20(2009太原)化简:21(2009上海)计算:22(2009眉山)化简:23(2009江苏)计算:(1)24(2009东营)化简:;(2)25(2008白银)化简:26(2007南昌)化简:27(2007巴中)计算:29(2006十堰)化简:30(2006南充)计算:x2)28(2006宜昌)计算:()