(-2/15-1 7/12)*30/103+2:2 1/4*9/32

(-2/15 - 1 7/12) * 30/103 + 2 : 2 1/4 * 9/32 = (-2/15 - 19/12) * 30/103 + 2 : 9/4 * 9/32 = -(2/15 + 19/12) * 30/103 + 2 * 9/32 : 9/4 = -(8/60 + 95/60) * 30/103 + 9 * 2/32 : 9/4 = -(8 + 95)/60 * 30/103 + 9 * 2/32 : 9/4 = -103/60 * 30/103 + 9 * 1/16 : 9/4 = -30/60 * 103/103 + 9 * 1/16 * 4/9 = -1/2 * 1 + 9 * 4/16 * 1/9 = -1/2 + 1 * 1/4 * 9/9 = -1/2 + 1/4 * 1 = -1/2 + 1/4 = -2/4 + 1/4 = (-2 + 1)/4 = -(2 - 1)/4 = -1/4Ответ: -1/4