Arithmetic Operator Puzzles

#2305: 5 _ 4 _ 2 _ 7 = -9 medium #2306: 5 _ 4 _ 2 _ 2 = 19 hard #2307: 5 _ 4 _ 2 _ 1 = 9 easy #2308: 5 _ 4 _ 2 _ 2 = 12 easy #2309: 5 _ 4 _ 2 _ 3 = 13 easy #2310: 5 _ 4 _ 2 _ 4 = 6 easy #2311: 5 _ 4 _ 2 _ 5 = 5 easy #2312: 5 _ 4 _ 2 _ 6 = 4 easy #2313: 5 _ 4 _ 2 _ 7 = 17 hard #2314: 5 _ 4 _ 2 _ 7 = 3 easy #2315: 5 _ 4 _ 2 _ 8 = 18 hard #2316: 5 _ 4 _ 2 _ 8 = 2 easy #2317: 5 _ 4 _ 2 _ 9 = 1 easy #2318: 5 _ 4 _ 2 _ 6 = 15 medium #2319: 5 _ 4 _ 2 _ 8 = 20 hard #2320: 5 _ 4 _ 3 _ 2 = 11 easy #2321: 5 _ 4 _ 3 _ 6 = 7 easy #2322: 5 _ 4 _ 3 _ 6 = 13 medium #2323: 5 _ 4 _ 3 _ 9 = 17 hard #2324: 5 _ 4 _ 3 _ 2 = -1 easy #2325: 5 _ 4 _ 3 _ 6 = 3 easy #2326: 5 _ 4 _ 3 _ 6 = -3 easy #2327: 5 _ 4 _ 3 _ 3 = 19 hard #2328: 5 _ 4 _ 4 _ 2 = 13 easy #2329: 5 _ 4 _ 4 _ 8 = 7 easy #2330: 5 _ 4 _ 4 _ 2 = -3 easy #2331: 5 _ 4 _ 4 _ 8 = 3 easy #2332: 5 _ 4 _ 4 _ 4 = 19 hard #2333: 5 _ 4 _ 4 _ 8 = 10 easy #2334: 5 _ 4 _ 5 _ 2 = 15 medium #2335: 5 _ 4 _ 5 _ 2 = -5 easy #2336: 5 _ 4 _ 5 _ 4 = 16 easy #2337: 5 _ 4 _ 5 _ 8 = 2 easy #2338: 5 _ 4 _ 6 _ 3 = 13 medium #2339: 5 _ 4 _ 6 _ 8 = 8 medium #2340: 5 _ 4 _ 6 _ 9 = 11 hard #2341: 5 _ 4 _ 6 _ 3 = -3 easy #2342: 5 _ 4 _ 6 _ 9 = -1 easy #2343: 5 _ 4 _ 6 _ 6 = 19 hard #2344: 5 _ 4 _ 6 _ 2 = 15 medium #2345: 5 _ 4 _ 7 _ 2 = 19 hard #2346: 5 _ 4 _ 7 _ 2 = -9 medium #2347: 5 _ 4 _ 7 _ 7 = 19 hard #2348: 5 _ 4 _ 8 _ 2 = 6 easy #2349: 5 _ 4 _ 8 _ 6 = 8 medium #2350: 5 _ 4 _ 8 _ 6 = 2 easy #2351: 5 _ 4 _ 8 _ 2 = 16 hard #2352: 5 _ 4 _ 8 _ 4 = 18 hard