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---- 1111 - 111^1 = 1000
---- ( 500 + 500) + ( 500 - 500 + 500 -500 + 500 - 500) = 1000
---- ((500 + 500) * (500 x 500 x 500)) / (500 x 500 x 500) = 1000
---- 888 + 88 + 8 + 8 + 8 = 1000
---- ( 1111 - 111) / 1 = 1000
---- (2222 - 222) / 2 = 1000
---- (3333 - 333) / 3 = 1000
---- (4444 - 444) / 4 = 1000
---- (5555 - 555) / 5 = 1000
---- (6666 - 666) / 6 = 1000
---- (7777 - 777) / 7 = 1000
---- (8888 - 888) / 8 = 1000
---- (9999 - 999) / 9 = 1000