Problem: what is the smallest positive perfect square that is divisible by 4 , 9 , and 18 ?
Rationale: "the number needs to be divisible by 2 ^ 2 , 3 ^ 2 , and 2 * 3 ^ 2 . the smallest such perfect square is 2 ^ 2 * 3 ^ 2 = 36 the answer is a ."
annotated_formula: add(multiply(multiply(multiply(4, power(const_3, const_2)), 9), const_2), multiply(9, 18))