Medium Arithmetic Puzzles

#704: 2 _ 4 _ 8 _ 9 = -5 medium #706: 2 _ 4 _ 9 _ 6 = 8 medium #707: 2 _ 4 _ 9 _ 6 = -4 medium #709: 2 _ 4 _ 9 _ 9 = 9 medium #711: 2 _ 4 _ 9 _ 6 = 12 medium #715: 2 _ 5 _ 2 _ 4 = 20 medium #716: 2 _ 5 _ 3 _ 6 = 12 medium #723: 2 _ 5 _ 4 _ 8 = 12 medium #725: 2 _ 5 _ 4 _ 8 = -8 medium #729: 2 _ 5 _ 4 _ 6 = 15 medium #734: 2 _ 5 _ 6 _ 2 = 13 medium #739: 2 _ 5 _ 6 _ 4 = 15 medium #743: 2 _ 5 _ 7 _ 5 = 14 medium #744: 2 _ 5 _ 8 _ 4 = -8 medium #746: 2 _ 5 _ 8 _ 8 = 11 medium #748: 2 _ 5 _ 8 _ 4 = 8 medium #749: 2 _ 5 _ 8 _ 8 = 9 medium #753: 2 _ 5 _ 9 _ 3 = 7 medium #754: 2 _ 5 _ 9 _ 9 = 9 medium #760: 2 _ 6 _ 2 _ 2 = 13 medium #765: 2 _ 6 _ 3 _ 5 = 12 medium #769: 2 _ 6 _ 3 _ 5 = -8 medium #770: 2 _ 6 _ 3 _ 3 = 13 medium #780: 2 _ 6 _ 3 _ 7 = -6 medium #781: 2 _ 6 _ 3 _ 8 = 9 medium #782: 2 _ 6 _ 3 _ 8 = -7 medium #783: 2 _ 6 _ 3 _ 9 = 10 medium #794: 2 _ 6 _ 4 _ 4 = 13 medium #796: 2 _ 6 _ 4 _ 3 = 16 medium #804: 2 _ 6 _ 4 _ 5 = 15 medium #807: 2 _ 6 _ 4 _ 7 = 10 medium #809: 2 _ 6 _ 4 _ 8 = 11 medium #810: 2 _ 6 _ 4 _ 8 = -5 medium #811: 2 _ 6 _ 4 _ 9 = -6 medium #814: 2 _ 6 _ 5 _ 3 = 12 medium #815: 2 _ 6 _ 5 _ 3 = -8 medium #816: 2 _ 6 _ 5 _ 5 = 13 medium #818: 2 _ 6 _ 5 _ 4 = 15 medium #821: 2 _ 6 _ 6 _ 9 = 6 medium #823: 2 _ 6 _ 6 _ 9 = -2 medium #824: 2 _ 6 _ 6 _ 2 = 15 medium #825: 2 _ 6 _ 6 _ 6 = 13 medium #829: 2 _ 6 _ 7 _ 7 = 13 medium #830: 2 _ 6 _ 7 _ 7 = 11 medium #831: 2 _ 6 _ 7 _ 6 = 14 medium #837: 2 _ 6 _ 8 _ 2 = 8 medium #838: 2 _ 6 _ 8 _ 8 = 11 medium #842: 2 _ 6 _ 9 _ 6 = 6 medium