Arithmetic Operator Puzzles

#4321: 9 _ 4 _ 3 _ 7 = 5 easy #4322: 9 _ 4 _ 3 _ 8 = 20 hard #4323: 9 _ 4 _ 3 _ 8 = 4 easy #4324: 9 _ 4 _ 3 _ 9 = 3 easy #4325: 9 _ 4 _ 3 _ 8 = 6 easy #4326: 9 _ 4 _ 4 _ 2 = 17 hard #4327: 9 _ 4 _ 4 _ 8 = 11 hard #4328: 9 _ 4 _ 4 _ 2 = 1 easy #4329: 9 _ 4 _ 4 _ 8 = 7 medium #4330: 9 _ 4 _ 5 _ 2 = 19 hard #4331: 9 _ 4 _ 5 _ 2 = -1 easy #4332: 9 _ 4 _ 6 _ 3 = 17 hard #4333: 9 _ 4 _ 6 _ 8 = 12 hard #4334: 9 _ 4 _ 6 _ 3 = 1 easy #4335: 9 _ 4 _ 6 _ 8 = 6 medium #4336: 9 _ 4 _ 6 _ 9 = 3 easy #4337: 9 _ 4 _ 6 _ 1 = 5 easy #4338: 9 _ 4 _ 6 _ 2 = 4 easy #4339: 9 _ 4 _ 6 _ 2 = 12 medium #4340: 9 _ 4 _ 6 _ 2 = 3 easy #4341: 9 _ 4 _ 6 _ 3 = 9 medium #4342: 9 _ 4 _ 6 _ 4 = 10 medium #4343: 9 _ 4 _ 6 _ 4 = 2 easy #4344: 9 _ 4 _ 6 _ 5 = 11 hard #4345: 9 _ 4 _ 6 _ 5 = 1 easy #4346: 9 _ 4 _ 6 _ 7 = 13 hard #4347: 9 _ 4 _ 6 _ 7 = -1 easy #4348: 9 _ 4 _ 6 _ 8 = 14 hard #4349: 9 _ 4 _ 6 _ 8 = -2 medium #4350: 9 _ 4 _ 6 _ 9 = -3 medium #4351: 9 _ 4 _ 7 _ 2 = -5 medium #4352: 9 _ 4 _ 8 _ 2 = 10 medium #4353: 9 _ 4 _ 8 _ 2 = -7 hard #4354: 9 _ 4 _ 8 _ 2 = 8 medium #4355: 9 _ 4 _ 8 _ 6 = 6 medium #4356: 9 _ 4 _ 8 _ 4 = 18 hard #4357: 9 _ 4 _ 8 _ 1 = 19 hard #4358: 9 _ 4 _ 8 _ 1 = 17 hard #4359: 9 _ 4 _ 8 _ 2 = 16 hard #4360: 9 _ 4 _ 8 _ 3 = 15 hard #4361: 9 _ 4 _ 8 _ 3 = 6 easy #4362: 9 _ 4 _ 8 _ 4 = 14 hard #4363: 9 _ 4 _ 8 _ 5 = 13 hard #4364: 9 _ 4 _ 8 _ 7 = 11 hard #4365: 9 _ 4 _ 8 _ 8 = 10 medium #4366: 9 _ 4 _ 8 _ 9 = 9 medium #4367: 9 _ 4 _ 8 _ 9 = 2 easy #4368: 9 _ 4 _ 9 _ 6 = 15 hard