Let's break down the expression step by step:

First, let's simplify the expression inside the parentheses:
6,3:(-9/20) - 2,6:(-1/20) = -3/10 - 1/10 = -4/10 = -2/5

Now, let's multiply this result by (-4/19):
(-2/5) * (-4/19) = 8/95

Finally, let's subtract 0,6:(-0,36) from this result:
8/95 - 0,6:(-0,36) = 8/95 - 0.36 = 8/95 - 36/100 = (80 - 36)/(95*100) = 44/950 = 22/475

Therefore, the final result is 22/475.