Calculation questions: (- 11 and 2 / 3) △ 13 + 21 and 1 / 2 - (- 10 and 1 / 3) × (- 1 / 13)

Calculation questions: (- 11 and 2 / 3) △ 13 + 21 and 1 / 2 - (- 10 and 1 / 3) × (- 1 / 13)

(- 11 and 2 / 3) △ 13 + 21 and 1 / 2 - (- 10 and 1 / 3) × (- 1 / 13)
=-35/3×1/13-43/2×3/31×1/13
=-35/39-129/806
=1783/2418