化简3A^2-[5a-(1/2a-3)+2a^2]+4RTRT
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化简3A^2-[5a-(1/2a-3)+2a^2]+4RTRT
化简3A^2-[5a-(1/2a-3)+2a^2]+4
RTRT
化简3A^2-[5a-(1/2a-3)+2a^2]+4RTRT
3a^2-[5a-(1/2a-3)+2a^2]+4
=3a^2-5a+(1/2a-3)-2a^2+4
=a^2-5a+(1/2a-3)+4
=a^2-5a+1/2a-3+4
=a^2-9/2a+1
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
化简:a-2a+3a-4a+5a-6a+.+2010a+2011a.
化简 3a-[5a-(a+2)+a]-1
化简:a(a*a-1)+2a*a(a+1)-3a(2a-5)拜托了各位
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?
化简(a+ 3)(a-3) (a-5)(a+7)-2a(a-1)
[a/(a-1)+a/(a+2)](a+2)/(2a平方+3a+1)化简
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a
化简(a+1)(a-2)/(a+2)(a-2)+3
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)=
计算(a+3a+5a+.+2003a)-(2a+4a+6a+...+2004a)
(a+3a+5a+.+2003a)-(2a+4a+6a+.+2004a)