5ab^2-7a^2b-8ab^2-3a^b合并同类项

a^2b-ab+2ab^2-5a^b-4ab+3ab^2化简快 合并同类项5a²b-3ab-4ab²+7ab-2ab² 5ab^2-7a^2b-8ab^2-3a^b合并同类项 8ab-{4a-3[6ab+5(ab+a-b)-7a]-2}这道题怎么做 （a+ab)-[(ab-2b)-a]-(-9ab),其中a+b=-7,ab=3. -ab(a^2b^5-ab^3-b) a^2-3ab+b^2/ab=( )/ab-3 a^2-3ab+b^2/ab=( )/ab -3 5ab^2-{2a^b-[3ab^2-(4ab^2-2a^2b)]} a+b/2ab 2AB/A+B a+b/2ab 已知a=1,b=2,c=3,求整式-8ab-{4a-3[6ab+5(ab+a-b)-7a]-2c} 已知a=1,b=2,c=3,求整式-8ab-{4a-3[6ab+5(ab+a-b)-7a]-2c} (a-b)^3+2ab(a-b) (8a^2-3ab-5b^2)-(2a^2-2ab+3b^2) 正数ab满足a^3b+ab^3-2a^2b+2ab^2=7ab-8 求a^2-b^2 计算(3a^2b-7ab^2-a^2b^2)`5ab