2010 - 1912 = 98
1821 - 1912 = -91
1884
2013 minus 1958 = 55
1,993 minus 2,013 is -20.
2,013 minus 1,919 is 94.
2,013 minus 1,929 is 84.
2,013 minus 1,727 is 286.
2,013 minus 30 is 1,983.
1,956 minus 2,013 is -57.
2,013 minus 1,956 is 57.
2,013 minus 1,936 is 77.