To solve this expression, we can first simplify each multiplication operation:

7/5 × 8/17 = 56/85
7/5 × 12/17 = 84/85
7/5 × 3/17 = 21/85

Now, we can substitute these values back into the original expression:

56/85 + 84/85 - 21/85

Combining the fractions, we get:

(56 + 84 - 21) / 85
(140) / 85
28/17

Therefore, the final answer is 28/17.