Arithmetic Operator Puzzles

#3697: 8 _ 3 _ 6 _ 1 = 3 easy #3698: 8 _ 3 _ 6 _ 2 = 6 easy #3699: 8 _ 3 _ 6 _ 3 = 1 easy #3700: 8 _ 3 _ 6 _ 3 = 12 medium #3701: 8 _ 3 _ 6 _ 4 = 8 medium #3702: 8 _ 3 _ 6 _ 4 = 16 hard #3703: 8 _ 3 _ 6 _ 5 = 9 medium #3704: 8 _ 3 _ 6 _ 5 = -1 easy #3705: 8 _ 3 _ 6 _ 5 = 20 hard #3706: 8 _ 3 _ 6 _ 6 = -2 easy #3707: 8 _ 3 _ 6 _ 8 = -4 medium #3708: 8 _ 3 _ 6 _ 9 = 13 hard #3709: 8 _ 3 _ 6 _ 9 = -5 medium #3710: 8 _ 3 _ 6 _ 1 = 15 hard #3711: 8 _ 3 _ 6 _ 2 = 18 hard #3712: 8 _ 3 _ 6 _ 3 = 19 hard #3713: 8 _ 3 _ 6 _ 4 = 20 hard #3714: 8 _ 3 _ 6 _ 4 = 12 medium #3715: 8 _ 3 _ 6 _ 4 = 4 easy #3716: 8 _ 3 _ 6 _ 5 = 11 medium #3717: 8 _ 3 _ 6 _ 7 = 9 medium #3718: 8 _ 3 _ 6 _ 8 = 8 medium #3719: 8 _ 3 _ 6 _ 8 = 2 easy #3720: 8 _ 3 _ 6 _ 9 = 7 medium #3721: 8 _ 3 _ 6 _ 9 = 4 easy #3722: 8 _ 3 _ 8 _ 4 = 14 hard #3723: 8 _ 3 _ 8 _ 6 = 12 medium #3724: 8 _ 3 _ 8 _ 2 = -4 medium #3725: 8 _ 3 _ 8 _ 4 = 2 easy #3726: 8 _ 3 _ 8 _ 2 = 6 easy #3727: 8 _ 3 _ 8 _ 3 = 9 easy #3728: 8 _ 3 _ 8 _ 5 = 15 medium #3729: 8 _ 3 _ 8 _ 6 = 18 hard #3730: 8 _ 3 _ 8 _ 6 = 2 easy #3731: 8 _ 3 _ 8 _ 9 = 3 easy #3732: 8 _ 3 _ 9 _ 3 = 9 medium #3733: 8 _ 3 _ 9 _ 6 = 10 medium #3734: 8 _ 3 _ 9 _ 3 = 7 medium #3735: 8 _ 3 _ 9 _ 6 = 6 medium #3736: 8 _ 3 _ 9 _ 6 = 16 hard #3737: 8 _ 3 _ 9 _ 4 = 20 hard #3738: 8 _ 3 _ 9 _ 6 = 18 hard #3739: 8 _ 3 _ 9 _ 6 = 4 easy #3740: 8 _ 3 _ 9 _ 7 = 17 hard #3741: 8 _ 3 _ 9 _ 8 = 16 hard #3742: 8 _ 3 _ 9 _ 8 = 3 easy #3743: 8 _ 3 _ 9 _ 9 = 15 hard #3744: 8 _ 4 _ 2 _ 3 = 14 hard