Sat, 26 May 2018 22:02:25 +0200 export sort algebra;
wenzelm [Sat, 26 May 2018 22:02:25 +0200] rev 68295
export sort algebra;
(0) -30000 -10000 -3000 -1000 -300 -100 -30 -10 -1 +1 +10 +30 +100 +300 +1000 +3000 +10000 tip