(8a²-2b²)÷(4a²b+4ab²+b^3)/(2b²-5ab-3a²)×b/(b²-5ab+6a²)
=2(2a+b)(2a-b)×(b-3a)(2b+a)/[b(2a+b)^2]×b/[(2a-b)(3a-b)]
=-2(a+2b)/(2a+b).
(8a²-2b²)÷(4a²b+4ab²+b^3)/(2b²-5ab-3a²)×b/(b²-5ab+6a²)
=2(2a+b)(2a-b)×(b-3a)(2b+a)/[b(2a+b)^2]×b/[(2a-b)(3a-b)]
=-2(a+2b)/(2a+b).