Arithmetic Operator Puzzles

#3409: 7 _ 6 _ 3 _ 5 = 19 hard #3410: 7 _ 6 _ 3 _ 6 = 20 hard #3411: 7 _ 6 _ 3 _ 6 = 8 easy #3412: 7 _ 6 _ 3 _ 7 = 7 easy #3413: 7 _ 6 _ 4 _ 3 = 15 hard #3414: 7 _ 6 _ 4 _ 2 = 10 medium #3415: 7 _ 6 _ 4 _ 6 = 16 hard #3416: 7 _ 6 _ 4 _ 8 = 19 hard #3417: 7 _ 6 _ 4 _ 3 = -1 easy #3418: 7 _ 6 _ 4 _ 8 = 4 easy #3419: 7 _ 6 _ 4 _ 2 = 4 easy #3420: 7 _ 6 _ 4 _ 6 = -2 easy #3421: 7 _ 6 _ 4 _ 8 = -5 medium #3422: 7 _ 6 _ 5 _ 3 = 17 hard #3423: 7 _ 6 _ 5 _ 2 = -8 medium #3424: 7 _ 6 _ 5 _ 3 = -3 easy #3425: 7 _ 6 _ 6 _ 4 = 16 hard #3426: 7 _ 6 _ 6 _ 9 = 11 hard #3427: 7 _ 6 _ 6 _ 4 = -2 easy #3428: 7 _ 6 _ 6 _ 9 = 3 easy #3429: 7 _ 6 _ 7 _ 3 = -7 medium #3430: 7 _ 6 _ 7 _ 2 = 12 easy #3431: 7 _ 6 _ 7 _ 2 = 3 easy #3432: 7 _ 6 _ 7 _ 3 = 18 hard #3433: 7 _ 6 _ 7 _ 3 = 2 easy #3434: 7 _ 6 _ 8 _ 4 = 19 hard #3435: 7 _ 6 _ 8 _ 3 = -9 hard #3436: 7 _ 6 _ 8 _ 4 = -5 medium #3437: 7 _ 6 _ 8 _ 4 = 4 easy #3438: 7 _ 6 _ 9 _ 3 = 9 medium #3439: 7 _ 6 _ 9 _ 6 = 11 hard #3440: 7 _ 6 _ 9 _ 3 = 5 easy #3441: 7 _ 6 _ 9 _ 6 = 3 easy #3442: 7 _ 6 _ 9 _ 3 = 14 hard #3443: 7 _ 7 _ 2 _ 3 = 7 easy #3444: 7 _ 7 _ 2 _ 4 = 9 easy #3445: 7 _ 7 _ 2 _ 6 = 13 medium #3446: 7 _ 7 _ 2 _ 7 = 15 hard #3447: 7 _ 7 _ 2 _ 8 = 17 hard #3448: 7 _ 7 _ 2 _ 9 = 19 hard #3449: 7 _ 7 _ 2 _ 5 = -9 medium #3450: 7 _ 7 _ 2 _ 6 = 3 easy #3451: 7 _ 7 _ 3 _ 6 = -7 medium #3452: 7 _ 7 _ 3 _ 2 = 7 easy #3453: 7 _ 7 _ 3 _ 3 = 10 medium #3454: 7 _ 7 _ 3 _ 6 = 19 hard #3455: 7 _ 7 _ 3 _ 3 = -8 medium #3456: 7 _ 7 _ 3 _ 6 = 2 easy