(8a-7b)-(4a-5b)+3(a-2b)
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(8a-7b)-(4a-5b)+3(a-2b)(8a-7b)-(4a-5b)+3(a-2b)(8a-7b)-(4a-5b)+3(a-2b)（8a-7b)-(4a-5b)+3(a-2b)=8a-7b-4
(8a-7b)-(4a-5b)+3(a-2b)
(8a-7b)-(4a-5b)+3(a-2b)
(8a-7b)-(4a-5b)+3(a-2b)
（8a-7b)-(4a-5b)+3(a-2b)=8a-7b-4a+5b+3a-6b=(8a-4a+3a)+(-7b+5b-6b)=7a-8b
7a-4b
=7a-8b
=8a-7b-4a+5b+3a-6b
=7a-8b
(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b) 快
(3a-6b/a+b）-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
5(a*a*b-3*a*a*b)-2*(a*a*b-7*a*b*b)
初二分式的加减法2a-b-c/（a-b)(a-c)+ 2b-c-a/(b-c)(b-a)+ 2c-b-a/(c-b)(c-a)3a-6b/a+b- 5a-6b/a-b- 4a-5b/a+b+ 7a-8b/b-a注：有空格的地方是下一个分式
（3a+4b)(7a-8b)+(11a+2b)(8a-7a)
(3a-4b)(7a-8b)+(11a-12b)(8b-7a)
2(a+b)-[4(a+b)-3(a+b)]一[5(a-b)+(a-b)]过程
化简【3A方-(A+B)(B-A)】【4(-B-A)(B-A)+5B方】
a+b分之3a-6b－a-b分之5a-6b－a＋b分之4a-5b－b-a分之7a-8b
(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因式得
8a-7b-(4a-5b)+3a-2b)
(8a-7b)-(4a+5b)+(-2b+3a)
(8a-7b)-(4a-5b)+3(a-2b)
对任意自然数a,b,规定a#b=2*a+b,若a#2a#3a#4a#5a#6a#7a#8a#9a=3039,则A=（）
计算：(4a-b)^2-[8a*(a-b)-(3a-b)*(3a+b)]
1/(a-b)-1/(a+b)-(2b)/(a^2+b^2)-(4b^3)/(a^4+b^4)+(8b^7)/(b^8-a^8)快
1/a-b-1/a+b-2b/a^2+b^2-4b^3/a^4+b^4+8b^7/b^2-a^2
已知A=5a-3b,B=-6a+4b,则A-B等于 A.-a+b,B=11a+b C.11a-7b D -a-7b