Problem: what is 2 3 / 4 - 1 2 / 5 divided by 2 / 3 - 1 / 3 ?
Rationale: "2 3 / 4 - 1 2 / 5 = 11 / 4 - 7 / 5 = ( 55 - 28 ) / 20 = 27 / 20 2 / 3 - 1 / 3 = ( 6 - 3 ) / 3 = 3 / 3 = 1 so 27 / 20 / 1 = 27 - 20 answer - d"
annotated_formula: subtract(divide(add(multiply(const_10, 2), 2), 4), divide(add(const_10, 1), 5))