On Jul 24 2013, Olivier Gerard wrote: >(e^2-7)/(37-5e^2) gives [7; 9, 11, 13, 15, ...] >(37-5e^2)/(36e^2-266) gives [7; 9, 11, 13, 15, ...] Of course you meant [9; 11, 13, 15, ...] Cheers, Robert Israel