1 . ▁Therefore ▁to ▁calculate ▁the ▁returns ▁for ▁a ▁winning ▁Pat ent ▁it ▁is ▁just ▁a ▁case ▁of ▁multip lying ▁( a ▁+ ▁ 1 ), ▁( b ▁+ ▁ 1 ) ▁and ▁( c ▁+ ▁ 1 ) ▁together ▁and ▁subtract ing ▁ 1 ▁to ▁get ▁the ▁O M ▁for ▁the ▁winning ▁bet , ▁i . e . ▁O M ▁= ▁( a ▁+ ▁ 1 )( b ▁+ ▁ 1 )( c ▁+ ▁ 1 ) ▁− ▁ 1 . ▁Now ▁multiply ▁by ▁the ▁unit ▁st ake ▁to ▁get ▁the ▁total ▁return ▁on ▁the ▁bet . ▁ ▁E . g . ▁The ▁winning ▁Pat ent ▁described ▁earlier ▁can ▁be ▁more ▁quickly ▁and ▁simply ▁evaluated ▁by ▁the ▁following : ▁ ▁Total ▁returns ▁= ▁£ 2 ▁× ▁[( 4 / 6 ▁+ ▁ 2 ) ▁× ▁( 2 / 1 ▁+ ▁ 2 ) ▁× ▁( 1 1 / 4 ▁+ ▁ 2 ) ▁− ▁ 1 ] ▁= ▁£ 9 9 . 3 3 ▁ ▁Ign oring ▁any ▁bon uses , ▁a ▁ 5 0 ▁p ence ▁each - way ▁L ucky ▁ 6 3 ▁( total ▁st ake ▁£ 6 3 ) ▁with ▁ 4 ▁w inners ▁[ 2 - 1 , ▁ 5 - 2 , ▁ 7 - 2 ▁( all ▁ ▁odd s ▁a ▁place ) ▁and ▁ 6 - 4 ▁( ▁odd s ▁a ▁place )] ▁and ▁a ▁further ▁placed ▁horse ▁[ 9 - 2 ▁( ▁odd s ▁a ▁place )] ▁can ▁be ▁relatively ▁easily ▁calculated ▁as