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If you would like to calculate 1 3/14 - (-2 1/7) and express the answer in the simplest form, you can do this using the following steps:

1 3/14 - (-2 1/7) = 17/14 + 15/7 = 17/14 + 30/14 = 47/14 = 3 5/14

The result in the simplest form is 47/14.