(2 8/15-1 5/18-3 1/5)

To subtract mixed numbers, first convert each mixed number to an improper fraction:

2 8/15 = (2 x 15 + 8) / 15 = 38 / 15

1 5/18 = (1 x 18 + 5) / 18 = 23 / 18

3 1/5 = (3 x 5 + 1) / 5 = 16 / 5

Now subtract the fractions:

38/15 - 23/18 - 16/5

To subtract fractions, we need a common denominator. The least common multiple of 15, 18, and 5 is 90:

38/15 = 228/90 23/18 = 115/90 16/5 = 288/90

Now subtract the fractions:

228/90 - 115/90 - 288/90 = (228 - 115 - 288) / 90 = -175 / 90 = -35/18

Therefore, the result of the expression (2 8/15 - 1 5/18 - 3 1/5) is -35/18 or -1 17/18.