(1\2+2\3): 5\6 -12*(1\2-2\3) по действиям! заранее

(1/2 + 2/3) : 5/6 - 12 * (1/2 - 2/3) = 3ц. 2/5,
1) 1/2+2/3 = 3/6+4/6=7/6 = 1 1/6,
2) 1 1/6 : 5/6 = 7/6 * 6/5 = 7/5 = 1 2/5,
3) 1/2-2/3 = 3/6-4/6= - 1/6,
4) 12 * (-1/6) = - 12/6 = - 2,
5) 1 2/5 - (-2) = 1 2/5 + 2 = 3ц. 2/5