Las necesito antes de 5 minutos?

(3 + 1 / 4) - (2 + 1 / 6) = 5 / 4 + 13 / 6 = 15 / 12 + 26 / 12 = 41 / 12

1 / 2÷(1 / 4 + 1 / 3) = 1 / 2 - (3 / 12 + 4 / 12) = 1 / 2 - 7 / 12 = 6 / 12 - 7 / 12 = - 1 / 12

(5 / 3 - 1)·(7 / 2 - 2) = 2 / 3·3 / 2 = 6 / 6 = 1

(3 / 4 + 1 / 2)÷(5 / 3 + 1 / 6) = 5 / 4 ÷ 11 / 6 = 30 / 44 = 15 / 22

5 / 3 - 4 / 5·(5 / 6 + 1 / 2) + 7 / 10 =

5 / 3 - 4 / 5·8 / 6 + 7 / 10

5 / 3 - 20 / 30 + 7 / 10

5 / 3 - 2 / 3 + 7 / 10

3 / 3 + 7 / 10

1 + 7 / 10

17 / 10.