Rational number calculation (process) (4 1 / 4-5 5 / 12) - (12 1 / 6-4 1 / 3)

Rational number calculation (process) (4 1 / 4-5 5 / 12) - (12 1 / 6-4 1 / 3)

The original formula = (51 / 12-65 / 12) - (73 / 6-26 / 6) [become a false score, then pass the score]
=-14 / 12-94 / 12
=-9 [reduce to the simplest result]