简单的分式计算~

问题描述:

简单的分式计算~
<3a-3b/(10ab)>×<5a^2b^3/(a^2-b^2)>
(x^2-4y^2)/(x^2+2xy+y^2)÷<(x+2y)/(2x^2+2xy)>
<2ab^3)/(c^2d)>÷(6a^4/b^3)×(-3c/b^2)^3
<>表示大括号,/表示分号
还有,题目打错了,正确是<(2ab^3)/(c^2d)>÷<(6a^4)/(b^3)>×(-3c/b^2)^3

[(3a-3b)/(10ab)]*[5a^2b^3/(a^2-b^2)]=[3(a-b)/(10ab)]*{5a^2b^3/[(a+b)(a-b)]}=3ab^2/[2(a+b)];[(x^2-4y^2)/(x^2+2xy+y^2)]/[(x+2y)/(2x^2+2xy)]=(x+2y)(x-2y)/(x+y)^2]/{(x+2y)/[2x(x+y)] }=2x(x-2y)/(x+y);[2a...