Question

soma algébrica -2 (-2)+(-4-5+8)-3-(+4)-(-1)

Answer 1

4-1-3-5= -5. Simples!

Answer 2

$-2(-2)+(-4-5+8)-3-(+4)-(-1)= \\ \\ =-4+(-9+8)-3-4+1= \\ \\ =-4+(-1)-3-3= \\ \\ =-4-4-3=-11$