Problem: find the l . c . m of 6 , 15 , 24 and 20 .
Rationale: "explanation : 2 x 3 x 5 x 2 x 2 = 120 answer : option c"
annotated_formula: multiply(multiply(power(const_3, const_3), multiply(power(const_2, const_3), power(add(const_4, const_1), const_2))), divide(divide(divide(divide(divide(24, const_2), const_2), const_3), add(const_4, const_1)), add(const_4, const_1)))