1 and 2 / 3 - {the square of 5 and 3 / 4-2} [(- 1 / 2) square + 3 times (- 3 / 4)] times 1 / 2 cube}

1 and 2 / 3 - {the square of 5 and 3 / 4-2} [(- 1 / 2) square + 3 times (- 3 / 4)] times 1 / 2 cube}

1 and 2 / 3 - {the square of 5 and 3 / 4-2} [(- 1 / 2) square + 3 times (- 3 / 4)] times 1 / 2 cube} = 5 / 3 - [23 / 4-4 ÷ (1 / 4-3x3 / 4) X1 / 8] = 5 / 3 - (23 / 4 + 1 / 2 △ 2) = 5 / 3 - (23 / 4 + 1 / 4) = 5 / 3-6 = - 13 / 3