3(5a^2+2a-1)-4(3-8a+2a^2)
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3(5a^2+2a-1)-4(3-8a+2a^2)3(5a^2+2a-1)-4(3-8a+2a^2)3(5a^2+2a-1)-4(3-8a+2a^2)3(5a^2+2a-1)-4(3-8a+2a^2)
3(5a^2+2a-1)-4(3-8a+2a^2)
3(5a^2+2a-1)-4(3-8a+2a^2)
3(5a^2+2a-1)-4(3-8a+2a^2)
3(5a^2+2a-1)-4(3-8a+2a^2)
=15a^2+6a-3-12+32a-8a^2
=15a^2-8a^2+6a+32a-3-12
=7a^2+38a-15
3(5a^2+2a-1)-4(3-8a+2a^2)
=15a²+6a-3-12+32a-8a²
=7a²+38a-15
7a^2+38a-15
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?
2a*a+3a+2/a+1-a*a-a-5/a+2-3a*a-4a-5/a-2+2a*a-8a+5/a-3
a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a=
a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a
已知a^2+a+1=0,求1+a+a^2+a^3+a^4+a^5+a^6+a^7+a^8的值
已知1+a+a^2=0求1+a+a^2+a^3+a^4+a^5+a^6+a^7+a^8的值在线等
求和:1,a+a^2,a^3+a^4+a^5,a^6+a^7+a^8+a^9,···(a不等于0)
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)=?