(12a^5 - 6a - 10a^3) - (10a - 2a^5 - 14a^4) 是等于 14a^10 - 16a
1+2a+3a^2+4a^3+5a^4+6a^5+5a^6+4a^7+3a^82a^9+a^10
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
(a+3a+5a+...+2009a)-(2a+4a+6a+...+2008a)=
(a+3a+ 5a+```+2007a)-(2a+4a+6a+```+2008a)=?
(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)
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
23-a-{10a-[(5a-15)-(4-6a)]}
快 2a-10/9-6a+a²÷(a²-25)*3a²+15a/5-a
化简后求值[(a+3)/(a^2-4)+a/(6-a-a^2)]除以(4a+9)/(5a-10),其中a=-8
15a的3次方+10a平方等于 5a(3a+2)