|a-2|-|3-a|化简

化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a. 化简：a-2a+3a-4a+5a-6a+.+2010a+2011a. 化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a [a/(a-1)+a/(a+2)](a+2)/(2a平方+3a+1)化简 化简(a/a-2-a/a+3)*a^2+a-6/a 化简(a+1)(a-2)/(a+2)(a-2)+3 化简10+3a-a^2/2+a-a^2 化简 3a-[5a-(a+2)+a]-1 |a-2|-|3-a|化简 化简（2a-a*a)(a*a+4a+3)/(a*a*a+a*a)(a*a+a-6),并求当4a+3/a=0时,此分式的值 化简a+2a-3a-4q+5a+6a-7a-8a+...2001a+2002a-2003a-2004a 化简 a-2a+3a-4a+5a'''''''+99a-100a a=-2 的值 化简：a(a*a-1)+2a*a(a+1)-3a(2a-5)拜托了各位 化简a-2a+3a-4a+5a-6a…+99a-100a 化简:(a^3-a^2-a+1)/(a^3-3a^2+3a-1) (a^3 - a^2 - a + 1)/(a^3 - 3a^2 + 3a - 1) 化简. a^2-16/a^2-2a-3 *a-3/a^2-5a+4 化简 化简5a^2-[a^2+(5a^2-2a)-2(a^2-3a)]