Question

como fazer: -w +8yb +4w -2(w+y)

Answer 1

$P=-w +8yb +4w -2(w+y)\\ \\ P=-w +8yb +4w -2w+2y\\ \\ P=-w +4w-2w+8yb +2y\\ \\ P=(-w +4w-2w)+(8yb +2y)\\ \\ P=(-1 +4-2)w+(8b +2)y\\ \\ \large\boxed{P=w+(8b +2)y}$