(5/14+10/21)*3 3/5 +1 1/6:(13/22-25/33)=

(5/14 + 10/21) * 3 3/5 + 1 1/6 : (13/22 - 25/33) = (15/42 + 20/42) * (3 * 5 + 3)/5 + (1 * 6 + 1)/6 : (39/66 - 50/66) = 35/42 * (15 + 3)/5 + 7/6 : (39 - 50)/66 = 35/42 * 18/5 + 7/6 : (-11)/66 = (35 * 18)/(42 * 5) + 7/6 * (-6) = 3 - 7 = -4;

Ответ: - 4.