To solve this problem, we first need to simplify the expression inside the parentheses:

(6-2ц 1/10) 2ц 1/7
= (5ц 9/10) 2ц 1/7
= (59/10) * (15/7)
= 177/14

Now we multiply the result by 4/15:

(177/14) (4/15)
= 177/56 4/15
= 177/56 4/15
= 177/56 2/15
= 177/420
= 59/140

Therefore, (6-2ц 1/10 2ц 1/7) 4/15 = 59/140.