(8a^2-2b^2)除以(4a^2b+4ab^2+b^3)/(2b^2-5ab-3a^2)乘b/b^2-5ab+6a^2

(8a^2-2b^2)除以(4a^2b+4ab^2+b^3)/(2b^2-5ab-3a^2)乘b/b^2-5ab+6a^2=2*(2a+b)(2a-b)/{[b*(2a+b)^2]/(b-3a)(2b+a)}*b/(b-2a)(b-3a)=2*(2a+b)(2a-b)* (b-3a)(2b+a)*b/[ [b*(2a+b)^2*(b-2a)(b-3a)]=-2*(2b+a)/(2a+b)...