-(1)/(3)+((1)/(5)-(1)/(7))=

To solve the expression $-\frac{1}{3} + \left(\frac{1}{5} - \frac{1}{7}\right)$, we need to follow the order of operations, which is parentheses first, then addition and subtraction.<br /><br />Step 1: Calculate the expression inside the parentheses.<br />$\frac{1}{5} - \frac{1}{7} = \frac{7 - 5}{35} = \frac{2}{35}$<br /><br />Step 2: Add the result to $-\frac{1}{3}$.<br />$-\frac{1}{3} + \frac{2}{35} = -\frac{35}{105} + \frac{6}{105} = -\frac{29}{105}$<br /><br />Therefore, the correct answer is $-\frac{29}{105}$.