Arithmetic Operator Puzzles

#4417: 9 _ 6 _ 2 _ 3 = 1 easy #4418: 9 _ 6 _ 2 _ 4 = -1 easy #4419: 9 _ 6 _ 2 _ 5 = -2 medium #4420: 9 _ 6 _ 2 _ 5 = 15 hard #4421: 9 _ 6 _ 2 _ 6 = 9 medium #4422: 9 _ 6 _ 2 _ 6 = -3 medium #4423: 9 _ 6 _ 2 _ 7 = -4 medium #4424: 9 _ 6 _ 2 _ 8 = 11 hard #4425: 9 _ 6 _ 2 _ 8 = -5 medium #4426: 9 _ 6 _ 2 _ 9 = -6 medium #4427: 9 _ 6 _ 2 _ 4 = 3 easy #4428: 9 _ 6 _ 2 _ 8 = 6 easy #4429: 9 _ 6 _ 3 _ 2 = 18 hard #4430: 9 _ 6 _ 3 _ 9 = 11 hard #4431: 9 _ 6 _ 3 _ 4 = 17 hard #4432: 9 _ 6 _ 3 _ 5 = 19 hard #4433: 9 _ 6 _ 3 _ 9 = 7 medium #4434: 9 _ 6 _ 3 _ 4 = 1 easy #4435: 9 _ 6 _ 3 _ 5 = -1 easy #4436: 9 _ 6 _ 3 _ 7 = -5 medium #4437: 9 _ 6 _ 3 _ 8 = -7 hard #4438: 9 _ 6 _ 3 _ 4 = 18 hard #4439: 9 _ 6 _ 3 _ 2 = 1 easy #4440: 9 _ 6 _ 4 _ 3 = 17 hard #4441: 9 _ 6 _ 4 _ 8 = 12 hard #4442: 9 _ 6 _ 4 _ 6 = 18 hard #4443: 9 _ 6 _ 4 _ 3 = 1 easy #4444: 9 _ 6 _ 4 _ 8 = 6 medium #4445: 9 _ 6 _ 4 _ 2 = 6 medium #4446: 9 _ 6 _ 4 _ 8 = -3 medium #4447: 9 _ 6 _ 4 _ 1 = 5 easy #4448: 9 _ 6 _ 4 _ 2 = 8 medium #4449: 9 _ 6 _ 4 _ 2 = 4 easy #4450: 9 _ 6 _ 4 _ 2 = 3 easy #4451: 9 _ 6 _ 4 _ 3 = 9 medium #4452: 9 _ 6 _ 4 _ 3 = 18 hard #4453: 9 _ 6 _ 4 _ 4 = 10 medium #4454: 9 _ 6 _ 4 _ 5 = 11 hard #4455: 9 _ 6 _ 4 _ 5 = 1 easy #4456: 9 _ 6 _ 4 _ 6 = 12 hard #4457: 9 _ 6 _ 4 _ 7 = 13 hard #4458: 9 _ 6 _ 4 _ 7 = -1 easy #4459: 9 _ 6 _ 4 _ 8 = 14 hard #4460: 9 _ 6 _ 4 _ 8 = -2 medium #4461: 9 _ 6 _ 4 _ 9 = 15 hard #4462: 9 _ 6 _ 4 _ 9 = -3 medium #4463: 9 _ 6 _ 5 _ 3 = 19 hard #4464: 9 _ 6 _ 5 _ 2 = -6 medium