1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a

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1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a

1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a
1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]
2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a

1.( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]2.[(a+2a^2-2a) - (a-1/a^2-4a+4)] ÷ 4-a/a
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1、
( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]
=［-2(2a-3)-3(2a+3)］/(2a+3)(2a-3)+[ 2a+15/ (2a-3)(2a+3)]
=(-4a+6-6a-9+2a+15)/(2a-3)(2a+3)
=(-8a+12)/(2a-3)(2a+3)]
=-4/(2a-3)
2、

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1、
( -2/2a+3) + (3/3-2a)+[ 2a+15/ (2a-3)(2a+3)]
=［-2(2a-3)-3(2a+3)］/(2a+3)(2a-3)+[ 2a+15/ (2a-3)(2a+3)]
=(-4a+6-6a-9+2a+15)/(2a-3)(2a+3)
=(-8a+12)/(2a-3)(2a+3)]
=-4/(2a-3)
2、
[ a+2/a(a-2) ] - (a-1/a^2-4a+4)] ÷ 4-a/a
=((a+2)(a-2)-a(a-1))/a(a-2)²÷4-a/a
=(a-4)/a(a-2)²÷4-a/a
=-1/(a-2)²

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计算(3a×a)+(2a×3a)+(3a×a)+[a×(a+2a+2a+2a+a)] (a 1)(a 2)(a 3)(a (a+2)(a+1)-a(a-3) 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 化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a. (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)= 化简：a-2a+3a-4a+5a-6a+.+2010a+2011a. 计算(a+3a+5a+.+2003a)-(2a+4a+6a+...+2004a) (a+3a+5a+.+2003a)-(2a+4a+6a+.+2004a) （a+3a+5a...+2009a)-(2a+4a+6a+...+2010a)=? 5a^-〔a^-2a-2(a^-3a)] a(a-1)(a-2)(a-3)(a-4)因式分解 (通分） a/a^a^a+3a+2 ,a/a^a+2a+1 ,-1/3a+6 【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a－a a=[ ] [4]a－a=a＋a a=[ ]