Problem: what is the prime factors ’ number of 28 ?
Rationale: "prime factors ’ number , as i assume , for a number x = a ^ n * b ^ m * c ^ o * d ^ p . . . is = n + m + o + p . . . so , 28 = 2 ^ 2 * 7 ^ 1 prime factors ’ number will be 2 + 1 = 3 . hence , answer is b ."
annotated_formula: add(add(add(const_1, add(const_1, const_1)), const_1), const_1)