Medium Arithmetic Puzzles

#2461: 5 _ 6 _ 6 _ 4 = 14 medium #2462: 5 _ 6 _ 6 _ 9 = 9 medium #2467: 5 _ 6 _ 7 _ 3 = -9 medium #2469: 5 _ 6 _ 8 _ 4 = 8 medium #2470: 5 _ 6 _ 8 _ 4 = -7 medium #2473: 5 _ 6 _ 9 _ 3 = 7 medium #2474: 5 _ 6 _ 9 _ 6 = 9 medium #2476: 5 _ 6 _ 9 _ 3 = 10 medium #2480: 5 _ 7 _ 2 _ 4 = -9 medium #2482: 5 _ 7 _ 3 _ 6 = -9 medium #2485: 5 _ 7 _ 4 _ 2 = -9 medium #2487: 5 _ 7 _ 5 _ 2 = 14 medium #2489: 5 _ 7 _ 6 _ 3 = -9 medium #2492: 5 _ 8 _ 2 _ 4 = 9 medium #2494: 5 _ 8 _ 2 _ 3 = -7 medium #2503: 5 _ 8 _ 2 _ 8 = 12 medium #2506: 5 _ 8 _ 3 _ 4 = 11 medium #2507: 5 _ 8 _ 3 _ 6 = 9 medium #2508: 5 _ 8 _ 3 _ 2 = -7 medium #2512: 5 _ 8 _ 4 _ 3 = 11 medium #2516: 5 _ 8 _ 4 _ 5 = -5 medium #2517: 5 _ 8 _ 4 _ 6 = -7 medium #2519: 5 _ 8 _ 4 _ 1 = 11 medium #2520: 5 _ 8 _ 4 _ 2 = 12 medium #2521: 5 _ 8 _ 4 _ 2 = 8 medium #2536: 5 _ 8 _ 5 _ 4 = -5 medium #2539: 5 _ 8 _ 6 _ 3 = 9 medium #2541: 5 _ 8 _ 6 _ 4 = -7 medium #2562: 5 _ 9 _ 3 _ 5 = 10 medium #2563: 5 _ 9 _ 3 _ 6 = 9 medium #2564: 5 _ 9 _ 3 _ 7 = 8 medium #2565: 5 _ 9 _ 3 _ 9 = 6 medium #2566: 5 _ 9 _ 3 _ 6 = 10 medium #2579: 5 _ 9 _ 6 _ 3 = 10 medium #2583: 6 _ 1 _ 2 _ 8 = 10 medium #2586: 6 _ 1 _ 4 _ 8 = 8 medium #2589: 6 _ 2 _ 2 _ 2 = 13 medium #2592: 6 _ 2 _ 2 _ 5 = 13 medium #2593: 6 _ 2 _ 2 _ 6 = 15 medium #2598: 6 _ 2 _ 2 _ 6 = -9 medium #2600: 6 _ 2 _ 2 _ 8 = 12 medium #2610: 6 _ 2 _ 3 _ 7 = 11 medium #2612: 6 _ 2 _ 3 _ 8 = 12 medium #2613: 6 _ 2 _ 3 _ 8 = -4 medium #2615: 6 _ 2 _ 3 _ 9 = -5 medium #2619: 6 _ 2 _ 3 _ 4 = -9 medium #2622: 6 _ 2 _ 4 _ 8 = 10 medium #2626: 6 _ 2 _ 4 _ 4 = 13 medium