Perform the indicated operations, then simplify. b²/6a² - 1/3a³ + 3b/8a
O (b²+3b-1)/11a⁶
O (b²-1+3b)/6a²-3a³+8a
O (4ab²-8+9a²³b)/24a³
O (b²-1+3b)/24a³