[tex]( \frac{1}{7} + \frac{7}{11} + \frac{2010}{2011} ) + ( \frac{6}{7} + \frac{4}{11} - \frac{2010}{2011} ) = \\ ( \frac{22121 + 98539 + 154770}{7 \times 11 \times 2011} ) + ( \frac{132726 + 56308 - 154770}{7 \times 11 \times 2011} ) = \\ \frac{275430}{154847} + \frac{34264}{154847} = \frac{309694}{154847} = \frac{2}{1} = 2[/tex]
