En resumen

[ - (2 / 5) + 2 / 4 - 12 / 6] * 7 / 6 ÷ 4 / 2 [ - (4 + 2 / 10) - 12 / 6] * 14 / 24 [ - (1 / 5) - 12 / 6] * 14 / 24 66 / 30 * 14 / 24 3 / 15 * 7 / 2 = 21 / 30.

Mejor respuesta

Chorromorro
3

[ - (2 / 5) + 2 / 4 - 12 / 6] * 7 / 6 ÷ 4 / 2

[ - (4 + 2 / 10) - 12 / 6] * 14 / 24

[ - (1 / 5) - 12 / 6] * 14 / 24

66 / 30 * 14 / 24

3 / 15 * 7 / 2 = 21 / 30.