Question

reducir x-(x-(y-{2x-y])+x-(-y)]

Answer 1

x-(x-(y-[2x-y])+x-(-y))
x-(x-(y-2x+y)+x-(-y))

x-(x-(-2x)+x-(-y))

x-(x+2x+x-(-y))

x-(x+2x+x+y)

x-(4x+y)

x-4x-y

-3x-y