Medium Arithmetic Puzzles

#2086: 4 _ 9 _ 2 _ 3 = 10 medium #2087: 4 _ 9 _ 2 _ 3 = -2 medium #2088: 4 _ 9 _ 2 _ 8 = 9 medium #2097: 4 _ 9 _ 2 _ 8 = 10 medium #2098: 4 _ 9 _ 2 _ 9 = 9 medium #2100: 4 _ 9 _ 3 _ 2 = -2 medium #2105: 4 _ 9 _ 3 _ 3 = 9 medium #2106: 4 _ 9 _ 3 _ 4 = 8 medium #2108: 4 _ 9 _ 3 _ 5 = 7 medium #2109: 4 _ 9 _ 3 _ 6 = 6 medium #2117: 4 _ 9 _ 4 _ 6 = 10 medium #2119: 4 _ 9 _ 4 _ 6 = -2 medium #2125: 4 _ 9 _ 6 _ 4 = -2 medium #2128: 4 _ 9 _ 6 _ 2 = 8 medium #2130: 4 _ 9 _ 6 _ 2 = 12 medium #2131: 4 _ 9 _ 6 _ 3 = 9 medium #2140: 4 _ 9 _ 6 _ 8 = -2 medium #2142: 4 _ 9 _ 6 _ 9 = -3 medium #2148: 5 _ 1 _ 2 _ 8 = 9 medium #2150: 5 _ 1 _ 3 _ 9 = 8 medium #2163: 5 _ 2 _ 4 _ 8 = 9 medium #2167: 5 _ 2 _ 4 _ 6 = 15 medium #2172: 5 _ 2 _ 4 _ 4 = 14 medium #2173: 5 _ 2 _ 4 _ 5 = 15 medium #2175: 5 _ 2 _ 4 _ 6 = 16 medium #2186: 5 _ 2 _ 5 _ 7 = 14 medium #2191: 5 _ 2 _ 6 _ 4 = 15 medium #2201: 5 _ 2 _ 7 _ 7 = 11 medium #2205: 5 _ 2 _ 8 _ 4 = 12 medium #2206: 5 _ 2 _ 8 _ 8 = 11 medium #2208: 5 _ 2 _ 8 _ 4 = 8 medium #2209: 5 _ 2 _ 8 _ 8 = 9 medium #2218: 5 _ 2 _ 8 _ 8 = 12 medium #2220: 5 _ 2 _ 9 _ 6 = 8 medium #2224: 5 _ 2 _ 9 _ 3 = 7 medium #2225: 5 _ 2 _ 9 _ 9 = 9 medium #2230: 5 _ 3 _ 2 _ 8 = -7 medium #2231: 5 _ 3 _ 2 _ 2 = 16 medium #2232: 5 _ 3 _ 2 _ 2 = 14 medium #2233: 5 _ 3 _ 3 _ 9 = 6 medium #2235: 5 _ 3 _ 3 _ 3 = 16 medium #2241: 5 _ 3 _ 4 _ 4 = 14 medium #2242: 5 _ 3 _ 5 _ 5 = 16 medium #2243: 5 _ 3 _ 5 _ 5 = 14 medium #2247: 5 _ 3 _ 5 _ 6 = 18 medium #2249: 5 _ 3 _ 6 _ 9 = 7 medium #2251: 5 _ 3 _ 6 _ 8 = 9 medium #2255: 5 _ 3 _ 6 _ 9 = 10 medium