Let's break down the expression step by step:
(-5 / (-2-1))(-4) - (-5-2+(-3)) / (-1)
= (-5 / -3)(-4) - (-5-2-3) / (-1) (simplifying the first fraction by dividing -5 by -3, which gives 5/3)
= (5/3)(-4) - (-10) / (-1) (simplifying the second fraction by adding and subtracting -5, -2, and -3, which gives -10)
= -20/3 + 10 (multiplying 5/3 and -4 gives -20/3)
= (-20 + 30) / 3 (finding a common denominator of 3 and adding -20/3 and 30/3)
= 10/3
Therefore, the expression simplifies to 10/3.