Выполните действие : ( 2_ 1/2 - 3/5 * 2_1/2) : 7/10 + 1_5/6

1) 3/5 * 2_1/2 = 3/5 * 5/2 = 3/22) 2_1/2 - 3/2 = 5/2 - 3/2 =2/2 =13) 1 : 7/10 = 10/74) 10/7 + 1_5/6=10/7+11/6 =137/42=3_11/42