-(2a -b )+[a -(3a +4b ]
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x)}(QA7IAS;Hk'*h$)$/!i{m\Q~O/H!fI{:A*Nʁ8@ImP9$aD ad_\gr4 3d
2a(a-b)+4a(2a+3b)
2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程
计算:(4a-b)^2-[8a*(a-b)-(3a-b)*(3a+b)]
5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b)
2a+(4a-5a)-3(a-2b)
(2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/a]
化简:[2/3a - 2/(a+b) * (a+b/3a - a - b)] / (a-b)/a
(a+2b)(a-2b)+(a-b)(a+b)-2(a-3b)(a-b)
因式分解:1、a*a*a*a+2a*a*a*b+3a*a*b*b+2a*b*b*b+b2、(a+1)(a+3)(a+4)(a+6)-280
2a-{7b+[4a-7b-(2a-6a-4b)]-3a
(a-b)^4+a^2(b-a)^2-2a(b-a)^3 .
(3a+4b)(7a-8b)+(11a+2b)(8a-7a)
(a^2+1)(-4a^2+1)+a^4-1 3a(a-b)(a+b)-6(b-a)^2a^2-9(a-b)^2= 3a(a-b)(a+b)-6(b-a)^2=
2a-[-3b+4a-(3a-b)
化简:3a-{-2b[a-(4a+3b)]}
2a+(4a-5b)-3(a-2b)
-(2a -b )+[a -(3a +4b ]
(2/3a)-[2/(a+b)]{[(a+b)/3a]-a-b}÷[(a-b)/b]