化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]
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化简3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]化简3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]化简3(-3a^2-2a)-[a^2-2(5a-4a^2+1
化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]
化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]
化简 3(-3a^2-2a)-[a^2-2(5a-4a^2+1)-3a]
3(-3a²-2a)-[a²-2(5a-4a²+1)-3a]
=-9a²-6a-(a²-10a+8a²-2-3a)
=-9a²-6a-(9a²-13a-2)
=-9a²-6a-9a²+13a+2
=-18a²+7a+2
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
化简：a-2a+3a-4a+5a-6a+.+2010a+2011a.
计算(3a×a)+(2a×3a)+(3a×a)+[a×(a+2a+2a+2a+a)]
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
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
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
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
a-2a+3a-4a+5a-6a+...+99a-100a
(a+3a+5a+...+2009a)-(2a+4a+6a+...+2008a)=
(a+3a+5a+.+2009a)-(2a+4a+6a+.2008a)
计算（a+3a+5a+...+2009a)-(2a+4a+6a+...+2010a)
(a+3a+5a+...+2013a)-(2a+4a+6a+...+2012a)=