Problem: at 12 : 30 , the hour hand and the minute hand of a clock form an angle of
Rationale: "answer : 180 degree answer : e"
annotated_formula: subtract(multiply(multiply(multiply(const_60, 12), const_2), divide(30, const_60)), multiply(divide(divide(multiply(multiply(const_60, 12), const_2), 12), const_4), add(divide(30, const_60), 12)))