Problem: evaluate : 30 - 12 ÷ 3 × 2 =
Rationale: "according to order of operations , 12 ÷ 3 × 2 ( division and multiplication ) is done first from left to right 12 ÷ 3 × 2 = 4 × 2 = 8 hence 30 - 12 ÷ 3 × 2 = 30 - 8 = 22 correct answer is b ) 22"
annotated_formula: subtract(30, multiply(multiply(12, const_2.0), 2))