Simplify: 8a3b212ab\frac{8a^3b^2}{12ab}12ab8a3b2 for a,b≠0a, b \neq 0a,b=0.
2a2b3\frac{2a^2b}{3}32a2b
2ab3\frac{2ab}{3}32ab
2a2b2a^2b2a2b
8a2b12\frac{8a^2b}{12}128a2b