Arithmetic Operator Puzzles

#4369: 9 _ 4 _ 9 _ 2 = -9 hard #4370: 9 _ 4 _ 9 _ 3 = -3 medium #4371: 9 _ 4 _ 9 _ 6 = 3 easy #4372: 9 _ 4 _ 9 _ 2 = 8 easy #4373: 9 _ 4 _ 9 _ 3 = 12 medium #4374: 9 _ 4 _ 9 _ 4 = 16 hard #4375: 9 _ 4 _ 9 _ 5 = 20 hard #4376: 9 _ 4 _ 9 _ 8 = 2 easy #4377: 9 _ 5 _ 2 _ 4 = 19 hard #4378: 9 _ 5 _ 2 _ 4 = -1 easy #4379: 9 _ 5 _ 2 _ 6 = -6 medium #4380: 9 _ 5 _ 2 _ 6 = 15 hard #4381: 9 _ 5 _ 3 _ 6 = 19 hard #4382: 9 _ 5 _ 3 _ 6 = -1 easy #4383: 9 _ 5 _ 3 _ 9 = -6 medium #4384: 9 _ 5 _ 3 _ 1 = 14 hard #4385: 9 _ 5 _ 3 _ 2 = 17 hard #4386: 9 _ 5 _ 3 _ 3 = 18 hard #4387: 9 _ 5 _ 3 _ 3 = 12 hard #4388: 9 _ 5 _ 3 _ 4 = 19 hard #4389: 9 _ 5 _ 3 _ 5 = 20 hard #4390: 9 _ 5 _ 3 _ 5 = 10 medium #4391: 9 _ 5 _ 3 _ 6 = 9 medium #4392: 9 _ 5 _ 3 _ 8 = 7 medium #4393: 9 _ 5 _ 3 _ 9 = 6 medium #4394: 9 _ 5 _ 4 _ 2 = 19 hard #4395: 9 _ 5 _ 4 _ 8 = 19 hard #4396: 9 _ 5 _ 4 _ 2 = -1 easy #4397: 9 _ 5 _ 4 _ 8 = -1 easy #4398: 9 _ 5 _ 6 _ 3 = 19 hard #4399: 9 _ 5 _ 6 _ 2 = -6 medium #4400: 9 _ 5 _ 6 _ 3 = -1 easy #4401: 9 _ 5 _ 6 _ 2 = 15 hard #4402: 9 _ 5 _ 8 _ 4 = 19 hard #4403: 9 _ 5 _ 8 _ 4 = -1 easy #4404: 9 _ 5 _ 9 _ 3 = -6 medium #4405: 9 _ 5 _ 9 _ 2 = 10 medium #4406: 9 _ 5 _ 9 _ 3 = 15 hard #4407: 9 _ 5 _ 9 _ 4 = 20 hard #4408: 9 _ 6 _ 2 _ 3 = 13 hard #4409: 9 _ 6 _ 2 _ 3 = 5 easy #4410: 9 _ 6 _ 2 _ 4 = 6 medium #4411: 9 _ 6 _ 2 _ 5 = -6 medium #4412: 9 _ 6 _ 2 _ 9 = 18 hard #4413: 9 _ 6 _ 2 _ 2 = 5 easy #4414: 9 _ 6 _ 2 _ 2 = 1 easy #4415: 9 _ 6 _ 2 _ 2 = 6 easy #4416: 9 _ 6 _ 2 _ 3 = 6 medium