Hard Arithmetic Puzzles

#3570: 8 _ 2 _ 3 _ 2 = 14 hard #3573: 8 _ 2 _ 3 _ 5 = 17 hard #3574: 8 _ 2 _ 3 _ 6 = 18 hard #3577: 8 _ 2 _ 3 _ 7 = 19 hard #3579: 8 _ 2 _ 3 _ 8 = 20 hard #3587: 8 _ 2 _ 4 _ 4 = 17 hard #3588: 8 _ 2 _ 4 _ 4 = 15 hard #3593: 8 _ 2 _ 4 _ 5 = 20 hard #3598: 8 _ 2 _ 4 _ 9 = 13 hard #3600: 8 _ 2 _ 4 _ 3 = 16 hard #3603: 8 _ 2 _ 5 _ 5 = 17 hard #3604: 8 _ 2 _ 5 _ 4 = 20 hard #3605: 8 _ 2 _ 5 _ 2 = 14 hard #3606: 8 _ 2 _ 5 _ 3 = 19 hard #3608: 8 _ 2 _ 5 _ 2 = 18 hard #3610: 8 _ 2 _ 5 _ 3 = 17 hard #3611: 8 _ 2 _ 5 _ 4 = 16 hard #3612: 8 _ 2 _ 5 _ 6 = 14 hard #3613: 8 _ 2 _ 5 _ 7 = 13 hard #3615: 8 _ 2 _ 5 _ 9 = 11 hard #3618: 8 _ 2 _ 6 _ 2 = 19 hard #3619: 8 _ 2 _ 6 _ 3 = 18 hard #3620: 8 _ 2 _ 6 _ 6 = 17 hard #3621: 8 _ 2 _ 6 _ 3 = 14 hard #3622: 8 _ 2 _ 6 _ 6 = 15 hard #3623: 8 _ 2 _ 6 _ 2 = 16 hard #3625: 8 _ 2 _ 6 _ 5 = 19 hard #3626: 8 _ 2 _ 6 _ 8 = 16 hard #3628: 8 _ 2 _ 6 _ 9 = 15 hard #3630: 8 _ 2 _ 7 _ 7 = 17 hard #3631: 8 _ 2 _ 7 _ 2 = 18 hard #3633: 8 _ 2 _ 7 _ 8 = 20 hard #3634: 8 _ 2 _ 7 _ 9 = 19 hard #3637: 8 _ 2 _ 8 _ 8 = 17 hard #3638: 8 _ 2 _ 8 _ 8 = 15 hard #3642: 8 _ 2 _ 8 _ 9 = 18 hard #3644: 8 _ 2 _ 9 _ 3 = 14 hard #3645: 8 _ 2 _ 9 _ 6 = 11 hard #3648: 8 _ 2 _ 9 _ 3 = 19 hard #3649: 8 _ 2 _ 9 _ 9 = 15 hard #3650: 8 _ 2 _ 9 _ 2 = 18 hard #3652: 8 _ 3 _ 2 _ 4 = 14 hard #3657: 8 _ 3 _ 2 _ 2 = 14 hard #3658: 8 _ 3 _ 2 _ 3 = 15 hard #3661: 8 _ 3 _ 2 _ 6 = 18 hard #3670: 8 _ 3 _ 4 _ 2 = 14 hard #3675: 8 _ 3 _ 4 _ 6 = 16 hard #3687: 8 _ 3 _ 4 _ 9 = 15 hard