Arithmetic Operator Puzzles

#1393: 3 _ 6 _ 9 _ 8 = 16 hard #1394: 3 _ 6 _ 9 _ 9 = 11 hard #1395: 3 _ 6 _ 9 _ 9 = -7 hard #1396: 3 _ 6 _ 9 _ 2 = 9 medium #1397: 3 _ 6 _ 9 _ 4 = 18 hard #1398: 3 _ 7 _ 2 _ 4 = 17 hard #1399: 3 _ 7 _ 2 _ 2 = 20 hard #1400: 3 _ 7 _ 2 _ 6 = 7 easy #1401: 3 _ 7 _ 3 _ 6 = 17 hard #1402: 3 _ 7 _ 3 _ 3 = 20 hard #1403: 3 _ 7 _ 3 _ 9 = 7 easy #1404: 3 _ 7 _ 3 _ 2 = 14 medium #1405: 3 _ 7 _ 4 _ 2 = 17 hard #1406: 3 _ 7 _ 4 _ 4 = 20 hard #1407: 3 _ 7 _ 4 _ 6 = 14 medium #1408: 3 _ 7 _ 6 _ 3 = 17 hard #1409: 3 _ 7 _ 6 _ 6 = 20 hard #1410: 3 _ 7 _ 6 _ 9 = 14 hard #1411: 3 _ 7 _ 6 _ 4 = 14 medium #1412: 3 _ 7 _ 7 _ 7 = 20 hard #1413: 3 _ 7 _ 8 _ 2 = 17 hard #1414: 3 _ 7 _ 8 _ 4 = 19 hard #1415: 3 _ 7 _ 8 _ 8 = 20 hard #1416: 3 _ 7 _ 9 _ 3 = 18 hard #1417: 3 _ 7 _ 9 _ 9 = 20 hard #1418: 3 _ 7 _ 9 _ 6 = 14 hard #1419: 3 _ 8 _ 2 _ 4 = 7 easy #1420: 3 _ 8 _ 2 _ 4 = -1 easy #1421: 3 _ 8 _ 2 _ 3 = -9 hard #1422: 3 _ 8 _ 2 _ 4 = 12 medium #1423: 3 _ 8 _ 2 _ 6 = 8 easy #1424: 3 _ 8 _ 2 _ 1 = 11 medium #1425: 3 _ 8 _ 2 _ 2 = 14 hard #1426: 3 _ 8 _ 2 _ 2 = 6 easy #1427: 3 _ 8 _ 2 _ 3 = 9 medium #1428: 3 _ 8 _ 2 _ 4 = 8 medium #1429: 3 _ 8 _ 2 _ 5 = 7 easy #1430: 3 _ 8 _ 2 _ 6 = 18 hard #1431: 3 _ 8 _ 2 _ 6 = 6 easy #1432: 3 _ 8 _ 2 _ 6 = 2 easy #1433: 3 _ 8 _ 2 _ 7 = 5 easy #1434: 3 _ 8 _ 2 _ 8 = 20 hard #1435: 3 _ 8 _ 2 _ 8 = 4 easy #1436: 3 _ 8 _ 2 _ 9 = 3 easy #1437: 3 _ 8 _ 3 _ 2 = 15 hard #1438: 3 _ 8 _ 3 _ 4 = 9 medium #1439: 3 _ 8 _ 3 _ 6 = 7 easy #1440: 3 _ 8 _ 3 _ 6 = 19 hard