3 △ 1 / 2-1 / 4 × 3 / 10 3 / 5 △ [(1 / 5 + 1 / 3) △ 2 / 9]

3 △ 1 / 2-1 / 4 × 3 / 10 3 / 5 △ [(1 / 5 + 1 / 3) △ 2 / 9]

(3 / 4 + 1 / 2) * 4 / 3
=3 / 4 * 4 / 3 + 1 / 2 * 4 / 3
=1 + 2 / 3
=One and two thirds