A = {1, 2, 3, 4, 5, 6}B = {a, b, c, d, e, f}C = {4, 5, 6, 7, 8, a, e, f, g, h}[(A (TRIANGULO) B) (TRIANGULO) C J N [(A - B) (TRIANGULO) (BnC)]?
A = {1, 2, 3, 4, 5, 6} B = {a, b, c, d, e, f} C = {4, 5, 6, 7, 8, a, e, f, g, h} [(A (TRIANGULO) B) (TRIANGULO) C J N [(A - B) (TRIANGULO) (BnC)].