нужно решить примеры 30000:100*1000,30000:1000*100,286*2-192:3,805:5+228:4,140100:100,140100-100

30000:100*1000 = 300 *10000 = 3 000 00030000:1000*100 = 30 * 100 = 3000286*2-192:3 = 572 - 64 = 508805:5+228:4 = 161 +57 = 218140100:100 = 1401140100-100 = 140000