First, simplify within the parentheses:
[-15/18]×[-3/10] = 5/12
[-25/26]×[-26/75] = 1

Now substitute these values back into the expression:
5/12 + 7/12 × 1 = 5/12 + 7/12
= (5 + 7) / 12
= 12/12
= 1

Therefore, the final result is 1.