evaluate : 57 - 12 * 3 * 2 = ?
"according to order of operations , 12 ? 3 ? 2 ( division and multiplication ) is done first from left to right 12 * * 2 = 4 * 2 = 8 hence 57 - 12 * 3 * 2 = 57 - 8 = 49 correct answer b"
subtract(57, multiply(multiply(12, const_2.0), 2))