化简:-3a²-a-2(2a²-2a)
化简:5a²-【a²+(5a²-2a)-2(a²-3a)】
3a²*a²+2a*a²*a²-4a²*a²
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
-(-3a²+2a-1)-a³化简
化简:4a²-[a²+(4a²-2a)-2(a²-3a)] 答得好,分高啊
5a²-(a²+(5a²-2a)-2(a²-3a))化简
合并同类项3a*3a+a*a-(2a*2a)+(3a-a*a)
(a 1)(a 2)(a 3)(a
a+a^2+a^3+a^4
化简a²根号8a+3a根号50a³-a/2根号18a³
化简(a²-6a+9分之a²+2a)除以(a²-3a分之a²-4)-(a-2分之