Odgovor:
# => boja (indigo) ((6x ^ 2) / ((4x + 1) (x-1) (7x + 1) (x + 1)) #
Obrazloženje:
# ((6x) / (4x ^ 2 -3x -1)) * (6 / (7x ^ 2 + 8x + 1)) #
# => (6x * x) / ((4x ^ 2-3x-1) * (7x ^ 2 + 8x + 1) #
# => (6x ^ 2) / ((4x ^ 2 -4x + x - 1) * (7x ^ 2 + 7x + x + 1)) #
# => (6x ^ 2) / ((4x (x-1) + (x - 1)) * (7x (x + 1) + (x + 1)) #
# => (6x ^ 2) / ((4x + 1) (x-1) (7x + 1) (x + 1)) #
