(a-b)^10/(b-a)^4/(b-a)^8
(a-b)^10/(b-a)^4/(b-a)^8
(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b
(3a-6b/a+b)-(5a-6b/a-b)-(4a-5b/a+b)-(7a-8b/b-a)
a+b>a-b,
(a-b)(a b)
a/b-b/a
计算:((a+b)(a-b)-(a-b)^2+2b(a-b))/4(a-b)
a-b>a,a+b
(a+2b)(2a+4b)(3a+6b)(4a+8b)
计算a+b/b-a-b/b
3a/a-4b +a+b/4b-a -7b/a-4b
计算:3a+4b/a-b+3b/b-a-4a/a-b