Which expression is equivalent to the following complex fraction? 2 minus startfraction 1 over y endfraction divided by 3 + startfraction 1 over y endfraction startfraction 3 y + 1 over 2 y minus 1 endfraction startfraction (2 y minus 1) (3 y + 1) over y squared endfraction startfraction y squared over (2 y minus 1) (3 y + 1) endfraction startfraction 2 y minus 1 over 3 y + 1 endfraction.