(6a+2b)(3a+3b)-4(a+b)

(a+2b)(2a+4b)(3a+6b)(4a+8b) 1.（a-b)^2（b-a)^3(a-b)^-4 (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) 当a+2b/2a-3b=3,求代数式4b+2a/9b-6a-4a-6b/3a+6b a+2b/2a-3b=3 求解4b+2a/9b-6a-4a-6b/3a+6b=? 计算(3a-2b)(9a*a+6ab+4b*b)-(3a+2b)(9a*a-6ab+4b*b) 如果a-2b/a+2b=3,求a+2b/a-2b+3a-6b/4a+8b （a-2b)/(a+2b)=3,求(a+2b)/(a-2b)+(3a-6b)/(4a+8b)的解, 计算：3a+4b/a-b+3b/b-a-4a/a-b 3a/a-4b +a+b/4b-a -7b/a-4b （3a+2b)(6a-5b)(2b-3a)(5a+6b)