Medium Arithmetic Puzzles

#3928: 8 _ 6 _ 3 _ 8 = 8 medium #3929: 8 _ 6 _ 3 _ 9 = 7 medium #3932: 8 _ 6 _ 3 _ 3 = 12 medium #3933: 8 _ 6 _ 3 _ 4 = 8 medium #3934: 8 _ 6 _ 3 _ 5 = 9 medium #3937: 8 _ 6 _ 3 _ 7 = 11 medium #3938: 8 _ 6 _ 3 _ 8 = 12 medium #3939: 8 _ 6 _ 3 _ 8 = -4 medium #3941: 8 _ 6 _ 3 _ 9 = -5 medium #3943: 8 _ 6 _ 4 _ 8 = 11 medium #3944: 8 _ 6 _ 4 _ 2 = 11 medium #3949: 8 _ 6 _ 4 _ 8 = -4 medium #3954: 8 _ 6 _ 4 _ 4 = 8 medium #3962: 8 _ 6 _ 5 _ 2 = -7 medium #3969: 8 _ 6 _ 7 _ 3 = -6 medium #3971: 8 _ 6 _ 8 _ 4 = 11 medium #3972: 8 _ 6 _ 8 _ 3 = -8 medium #3973: 8 _ 6 _ 8 _ 4 = -4 medium #3978: 8 _ 6 _ 9 _ 3 = 10 medium #3980: 8 _ 6 _ 9 _ 3 = 6 medium #3985: 8 _ 6 _ 9 _ 2 = 10 medium #3988: 8 _ 6 _ 9 _ 3 = 9 medium #3991: 8 _ 6 _ 9 _ 4 = 8 medium #3994: 8 _ 6 _ 9 _ 5 = 7 medium #3996: 8 _ 6 _ 9 _ 6 = 6 medium #4002: 8 _ 7 _ 2 _ 4 = -6 medium #4004: 8 _ 7 _ 3 _ 6 = -6 medium #4005: 8 _ 7 _ 4 _ 2 = -6 medium #4006: 8 _ 7 _ 4 _ 8 = -6 medium #4010: 8 _ 7 _ 4 _ 2 = 12 medium #4012: 8 _ 7 _ 4 _ 3 = 11 medium #4014: 8 _ 7 _ 4 _ 4 = 10 medium #4016: 8 _ 7 _ 4 _ 5 = 9 medium #4018: 8 _ 7 _ 4 _ 6 = 8 medium #4022: 8 _ 7 _ 6 _ 3 = -6 medium #4023: 8 _ 7 _ 8 _ 4 = -6 medium #4024: 8 _ 7 _ 8 _ 2 = 14 medium #4025: 8 _ 8 _ 2 _ 4 = 12 medium #4028: 8 _ 8 _ 2 _ 5 = 11 medium #4033: 8 _ 8 _ 2 _ 4 = -7 medium #4038: 8 _ 8 _ 3 _ 6 = 12 medium #4042: 8 _ 8 _ 3 _ 3 = -8 medium #4049: 8 _ 8 _ 4 _ 6 = -4 medium #4050: 8 _ 8 _ 4 _ 7 = -6 medium #4051: 8 _ 8 _ 4 _ 8 = -8 medium #4056: 8 _ 8 _ 4 _ 4 = 12 medium #4058: 8 _ 8 _ 4 _ 7 = 9 medium #4059: 8 _ 8 _ 4 _ 8 = 8 medium